diff --git a/go.mod b/go.mod
index 9dae34f..8caf47f 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/diamondburned/cchat v0.0.49
 	github.com/diamondburned/cchat-discord v0.0.0-20200821041521-647c854d7b5e
 	github.com/diamondburned/cchat-mock v0.0.0-20200709231652-ad222ce5a74b
-	github.com/diamondburned/handy v0.0.0-20200827040421-5b4a15843526 // indirect
+	github.com/diamondburned/handy v0.0.0-20200827040421-5b4a15843526
 	github.com/diamondburned/imgutil v0.0.0-20200710174014-8a3be144a972
 	github.com/disintegration/imaging v1.6.2
 	github.com/goodsign/monday v1.0.0
diff --git a/internal/gts/gts.go b/internal/gts/gts.go
index cf6d750..982a703 100644
--- a/internal/gts/gts.go
+++ b/internal/gts/gts.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/diamondburned/cchat-gtk/internal/gts/throttler"
 	"github.com/diamondburned/cchat-gtk/internal/log"
+	"github.com/diamondburned/handy"
 	"github.com/disintegration/imaging"
 	"github.com/gotk3/gotk3/gdk"
 	"github.com/gotk3/gotk3/glib"
@@ -21,12 +22,22 @@ var Args = append([]string{}, os.Args...)
 
 var App struct {
 	*gtk.Application
-	Window *gtk.ApplicationWindow
-	Header *gtk.HeaderBar
-
+	Window    *handy.ApplicationWindow
 	Throttler *throttler.State
 }
 
+// Windower is the interface for a window.
+type Windower interface {
+	gtk.IWidget
+	gtk.IWindow
+	throttler.Connector
+}
+
+func AddWindow(w Windower) {
+	App.AddWindow(w)
+	App.Throttler.Connect(w)
+}
+
 // Clipboard is initialized on init().
 var Clipboard *gtk.Clipboard
 
@@ -39,7 +50,8 @@ func NewModalDialog() (*gtk.Dialog, error) {
 	}
 	d.SetModal(true)
 	d.SetTransientFor(App.Window)
-	App.Throttler.Connect(d)
+
+	AddWindow(d)
 
 	return d, nil
 }
@@ -75,72 +87,42 @@ func init() {
 	App.Throttler = throttler.Bind(App.Application)
 }
 
-// // AppMenuWidget returns the box that holds the app menu.
-// func AppMenuWidget() (widget *gtk.Widget) {
-// 	App.Header.For().Foreach(func(v interface{}) {
-// 		// If we've already found the widget, then stop finding.
-// 		if widget != nil {
-// 			return
-// 		}
-
-// 		// Cast the interface to a widget.
-// 		curr := v.(gtk.IWidget).ToWidget()
-
-// 		log.Println("testing")
-
-// 		// Check if the widget has a class named "left".
-// 		if sctx, _ := curr.GetStyleContext(); sctx.HasClass("left") {
-// 			log.Println("has class .left")
-// 			widget = curr
-// 		}
-// 	})
-
-// 	return
-// }
-
-type Window interface {
-	Window() gtk.IWidget
-	Header() gtk.IWidget
+type MainApplication interface {
+	gtk.IWidget
 	Menu() *glib.MenuModel
 	Icon() *gdk.Pixbuf
 	Close()
 }
 
-func Main(wfn func() Window) {
+func Main(wfn func() MainApplication) {
 	App.Application.Connect("activate", func() {
+		handy.Init()
+
 		// Load all CSS onto the default screen.
 		loadProviders(getDefaultScreen())
 
-		App.Header, _ = gtk.HeaderBarNew()
-		// Right buttons only.
-		App.Header.SetDecorationLayout(":minimize,close")
-		App.Header.SetShowCloseButton(true)
-		App.Header.SetProperty("spacing", 0)
+		// App.Header, _ = gtk.HeaderBarNew()
+		// // Right buttons only.
+		// App.Header.SetDecorationLayout(":minimize,close")
+		// App.Header.SetShowCloseButton(true)
+		// App.Header.SetProperty("spacing", 0)
 
-		b, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
-		App.Header.SetCustomTitle(b)
-
-		App.Window, _ = gtk.ApplicationWindowNew(App.Application)
+		App.Window = handy.ApplicationWindowNew()
 		App.Window.SetDefaultSize(1000, 500)
-		App.Window.SetTitlebar(App.Header)
+		App.Window.Show()
+		AddWindow(&App.Window.Window)
+
+		App.Throttler.Connect(&App.Window.Window)
 
 		// Execute the function later, because we need it to run after
 		// initialization.
 		w := wfn()
-		App.Application.SetAppMenu(w.Menu())
-
+		App.Window.Add(w)
 		App.Window.SetIcon(w.Icon())
-		App.Window.Add(w.Window())
-		App.Window.Show()
-
-		App.Header.Add(w.Header())
-		App.Header.Show()
-
-		// Connect extra actions.
-		AddAppAction("quit", App.Window.Destroy)
+		// App.Application.SetAppMenu(w.Menu())
 
 		// Connect the destructor.
-		App.Window.Connect("destroy", func() {
+		App.Window.Window.Connect("destroy", func() {
 			// Hide the application window.
 			App.Window.Hide()
 
@@ -154,6 +136,9 @@ func Main(wfn func() Window) {
 				w.Close()
 			})
 		})
+
+		// Connect extra actions.
+		AddAppAction("quit", App.Window.Destroy)
 	})
 
 	// Use a special function to run the application. Exit with the appropriate
diff --git a/internal/ui/header.go b/internal/ui/header.go
index aeabd7a..969532c 100644
--- a/internal/ui/header.go
+++ b/internal/ui/header.go
@@ -9,43 +9,33 @@ import (
 	"github.com/diamondburned/cchat-gtk/internal/ui/primitives/actions"
 	"github.com/diamondburned/cchat-gtk/internal/ui/service/session"
 	"github.com/diamondburned/cchat-gtk/internal/ui/service/session/server/traverse"
+	"github.com/diamondburned/handy"
 	"github.com/gotk3/gotk3/glib"
 	"github.com/gotk3/gotk3/gtk"
 	"github.com/gotk3/gotk3/pango"
 )
 
 type header struct {
-	*gtk.Box
 	left  *headerLeft // middle-ish
 	right *headerRight
 	menu  *glib.Menu
 }
 
 func newHeader() *header {
-	left := newHeaderLeft()
-	left.Show()
-
-	right := newHeaderRight()
-	right.Show()
-
-	separator, _ := gtk.SeparatorNew(gtk.ORIENTATION_VERTICAL)
-	separator.Show()
-
-	box, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
-	box.PackStart(left, false, false, 0)
-	box.PackStart(separator, false, false, 0)
-	box.PackStart(right, true, true, 0)
-	box.Show()
-
 	menu := glib.MenuNew()
 	menu.Append("Preferences", "app.preferences")
 	menu.Append("Quit", "app.quit")
 
+	left := newHeaderLeft()
 	left.appmenu.SetMenuModel(&menu.MenuModel)
 
-	// TODO
+	right := newHeaderRight()
+
+	group := handy.HeaderGroupNew()
+	group.AddHeaderBar(&left.HeaderBar)
+	group.AddHeaderBar(&right.HeaderBar)
+
 	return &header{
-		box,
 		left,
 		right,
 		menu,
@@ -111,60 +101,84 @@ func (a *appMenu) SetSizeRequest(w, h int) {
 }
 
 type headerLeft struct {
-	*gtk.Box
+	handy.HeaderBar
+
 	appmenu *appMenu
 	svcname *gtk.Label
 	sesmenu *actions.MenuButton
 }
 
+var serviceNameCSS = primitives.PrepareClassCSS("service-name", `
+	.service-name {
+		margin-left: 14px;
+	}
+`)
+
+var sessionMenuCSS = primitives.PrepareClassCSS("session-menu", `
+	.session-menu {
+		margin: 0 5px;
+	}
+`)
+
 func newHeaderLeft() *headerLeft {
 	appmenu := newAppMenu()
 	appmenu.Show()
 
-	sep, _ := gtk.SeparatorNew(gtk.ORIENTATION_VERTICAL)
-	sep.Show()
-	primitives.AddClass(sep, "titlebutton")
+	// sep, _ := gtk.SeparatorNew(gtk.ORIENTATION_VERTICAL)
+	// sep.Show()
+	// primitives.AddClass(sep, "titlebutton")
 
-	svcname, _ := gtk.LabelNew("")
+	svcname, _ := gtk.LabelNew("cchat-gtk")
 	svcname.SetXAlign(0)
 	svcname.SetEllipsize(pango.ELLIPSIZE_END)
 	svcname.Show()
-	svcname.SetMarginStart(14)
+	serviceNameCSS(svcname)
 
 	sesmenu := actions.NewMenuButton()
 	sesmenu.Show()
+	sessionMenuCSS(sesmenu)
 
-	box, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
-	box.PackStart(appmenu, false, false, 0)
-	box.PackStart(sep, false, false, 0)
-	box.PackStart(svcname, true, true, 0)
-	box.PackStart(sesmenu, false, false, 5)
+	header := handy.HeaderBarNew()
+	header.SetShowCloseButton(true)
+	header.PackStart(appmenu)
+	// box.PackStart(sep, false, false, 0)
+	header.PackStart(svcname)
+	header.PackStart(sesmenu)
 
 	return &headerLeft{
-		Box:     box,
-		appmenu: appmenu,
-		svcname: svcname,
-		sesmenu: sesmenu,
+		HeaderBar: *header,
+		appmenu:   appmenu,
+		svcname:   svcname,
+		sesmenu:   sesmenu,
 	}
 }
 
 type headerRight struct {
-	*gtk.Box
+	handy.HeaderBar
+
 	breadcrumb *gtk.Label
 }
 
+var rightBreadcrumbCSS = primitives.PrepareClassCSS("right-breadcrumb", `
+	.right-breadcrumb {
+		margin: 0 14px;
+	}
+`)
+
 func newHeaderRight() *headerRight {
 	bc, _ := gtk.LabelNew(BreadcrumbSlash)
 	bc.SetUseMarkup(true)
 	bc.SetXAlign(0.0)
 	bc.Show()
+	rightBreadcrumbCSS(bc)
 
-	box, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
-	box.PackStart(bc, true, true, 14)
-	box.Show()
+	header := handy.HeaderBarNew()
+	header.SetShowCloseButton(true)
+	header.PackStart(bc)
+	header.Show()
 
 	return &headerRight{
-		Box:        box,
+		HeaderBar:  *header,
 		breadcrumb: bc,
 	}
 }
diff --git a/internal/ui/messages/header.go b/internal/ui/messages/header.go
new file mode 100644
index 0000000..3a6d26c
--- /dev/null
+++ b/internal/ui/messages/header.go
@@ -0,0 +1,64 @@
+package messages
+
+import (
+	"html"
+	"strings"
+
+	"github.com/diamondburned/cchat-gtk/internal/ui/primitives"
+	"github.com/diamondburned/cchat-gtk/internal/ui/service/session/server/traverse"
+	"github.com/diamondburned/handy"
+	"github.com/gotk3/gotk3/gtk"
+)
+
+// const BreadcrumbSlash = `<span rise="-1024" size="x-large">❭</span>`
+const BreadcrumbSlash = " 〉"
+
+type Header struct {
+	handy.HeaderBar
+
+	Breadcrumb *gtk.Label
+}
+
+var rightBreadcrumbCSS = primitives.PrepareClassCSS("right-breadcrumb", `
+	.right-breadcrumb {
+		margin: 0 14px;
+	}
+`)
+
+func NewHeader() *Header {
+	bc, _ := gtk.LabelNew(BreadcrumbSlash)
+	bc.SetUseMarkup(true)
+	bc.SetXAlign(0.0)
+	bc.Show()
+	rightBreadcrumbCSS(bc)
+
+	header := handy.HeaderBarNew()
+	header.SetShowCloseButton(true)
+	header.PackStart(bc)
+	header.Show()
+
+	return &Header{
+		HeaderBar:  *header,
+		Breadcrumb: bc,
+	}
+}
+
+func (h *Header) Reset() {
+	h.SetBreadcrumber(nil)
+}
+
+func (h *Header) SetBreadcrumber(b traverse.Breadcrumber) {
+	if b == nil {
+		h.Breadcrumb.SetText("")
+		return
+	}
+
+	var crumb = b.Breadcrumb()
+	for i := range crumb {
+		crumb[i] = html.EscapeString(crumb[i])
+	}
+
+	h.Breadcrumb.SetMarkup(
+		BreadcrumbSlash + " " + strings.Join(crumb, " "+BreadcrumbSlash+" "),
+	)
+}
diff --git a/internal/ui/messages/view.go b/internal/ui/messages/view.go
index e407797..cb98d30 100644
--- a/internal/ui/messages/view.go
+++ b/internal/ui/messages/view.go
@@ -49,8 +49,12 @@ type Controller interface {
 }
 
 type View struct {
-	*sadface.FaceView
-	Grid *gtk.Grid
+	*gtk.Box
+
+	Header *Header
+
+	FaceView *sadface.FaceView
+	Grid     *gtk.Grid
 
 	Scroller  *autoscroll.ScrolledWindow
 	InputView *input.InputView
@@ -126,6 +130,15 @@ func NewView(c Controller) *View {
 	logo.Show()
 
 	view.FaceView = sadface.New(view.Grid, logo)
+	view.FaceView.Show()
+
+	view.Header = NewHeader()
+	view.Header.Show()
+
+	view.Box, _ = gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
+	view.Box.PackStart(view.Header, false, false, 0)
+	view.Box.PackStart(view.FaceView, true, true, 0)
+
 	return view
 }
 
@@ -153,6 +166,7 @@ func (v *View) createMessageContainer() {
 func (v *View) Bottomed() bool { return v.Scroller.Bottomed }
 
 func (v *View) Reset() {
+	v.Header.Reset()     // Reset the header.
 	v.state.Reset()      // Reset the state variables.
 	v.Typing.Reset()     // Reset the typing state.
 	v.InputView.Reset()  // Reset the input.
@@ -194,7 +208,7 @@ func (v *View) JoinServer(session cchat.Session, server ServerMessage) {
 			err = errors.Wrap(err, "Failed to join server")
 			// Even if we're erroring out, we're running the done() callback
 			// anyway.
-			return func() { v.ctrl.OnMessageDone(); v.SetError(err) }, err
+			return func() { v.ctrl.OnMessageDone(); v.FaceView.SetError(err) }, err
 		}
 
 		return func() {
diff --git a/internal/ui/primitives/actions/menubutton.go b/internal/ui/primitives/actions/menubutton.go
index d3bc09d..0622093 100644
--- a/internal/ui/primitives/actions/menubutton.go
+++ b/internal/ui/primitives/actions/menubutton.go
@@ -14,6 +14,7 @@ type MenuButton struct {
 
 func NewMenuButton() *MenuButton {
 	b, _ := gtk.MenuButtonNew()
+	b.SetVAlign(gtk.ALIGN_CENTER)
 	b.SetSensitive(false)
 
 	return &MenuButton{
diff --git a/internal/ui/service/header.go b/internal/ui/service/header.go
new file mode 100644
index 0000000..57c72bb
--- /dev/null
+++ b/internal/ui/service/header.go
@@ -0,0 +1,137 @@
+package service
+
+import (
+	"github.com/diamondburned/cchat-gtk/icons"
+	"github.com/diamondburned/cchat-gtk/internal/ui/primitives"
+	"github.com/diamondburned/cchat-gtk/internal/ui/primitives/actions"
+	"github.com/diamondburned/cchat-gtk/internal/ui/service/session"
+	"github.com/diamondburned/cchat-gtk/internal/ui/service/session/server/traverse"
+	"github.com/diamondburned/handy"
+	"github.com/gotk3/gotk3/glib"
+	"github.com/gotk3/gotk3/gtk"
+	"github.com/gotk3/gotk3/pango"
+)
+
+type AppMenu struct {
+	gtk.MenuButton
+}
+
+func NewAppMenu() *AppMenu {
+	img, _ := gtk.ImageNew()
+	img.SetFromPixbuf(icons.Logo256(24))
+	img.Show()
+
+	appmenu, _ := gtk.MenuButtonNew()
+	appmenu.SetImage(img)
+	appmenu.SetUsePopover(true)
+	appmenu.SetHAlign(gtk.ALIGN_CENTER)
+	appmenu.SetMarginStart(8)
+	appmenu.SetMarginEnd(8)
+
+	return &AppMenu{*appmenu}
+}
+
+func (a *AppMenu) SetSizeRequest(w, h int) {
+	// Subtract the margin size.
+	if w -= 8 * 2; w < 0 {
+		w = 0
+	}
+
+	a.MenuButton.SetSizeRequest(w, h)
+}
+
+type Header struct {
+	handy.HeaderBar
+
+	MenuModel *glib.MenuModel
+
+	AppMenu *AppMenu
+	SvcName *gtk.Label
+	SesMenu *actions.MenuButton
+}
+
+var serviceNameCSS = primitives.PrepareClassCSS("service-name", `
+	.service-name {
+		margin-left: 14px;
+	}
+`)
+
+var sessionMenuCSS = primitives.PrepareClassCSS("session-menu", `
+	.session-menu {
+		margin: 0 5px;
+	}
+`)
+
+func NewHeader() *Header {
+	menu := glib.MenuNew()
+	menu.Append("Preferences", "app.preferences")
+	menu.Append("Quit", "app.quit")
+
+	appmenu := NewAppMenu()
+	appmenu.Show()
+	appmenu.SetMenuModel(&menu.MenuModel)
+
+	sep, _ := gtk.SeparatorNew(gtk.ORIENTATION_VERTICAL)
+	sep.Show()
+	primitives.AddClass(sep, "titlebutton")
+
+	svcname, _ := gtk.LabelNew("cchat-gtk")
+	svcname.SetXAlign(0)
+	svcname.SetEllipsize(pango.ELLIPSIZE_END)
+	svcname.Show()
+	serviceNameCSS(svcname)
+
+	sesmenu := actions.NewMenuButton()
+	sesmenu.Show()
+	sessionMenuCSS(sesmenu)
+
+	header := handy.HeaderBarNew()
+	header.SetProperty("spacing", 0)
+	header.SetShowCloseButton(true)
+	header.PackStart(appmenu)
+	header.PackStart(sep)
+	header.PackStart(svcname)
+	header.PackStart(sesmenu)
+
+	// Hack to hide the title.
+	b, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
+	header.SetCustomTitle(b)
+
+	return &Header{
+		HeaderBar: *header,
+		MenuModel: &menu.MenuModel,
+		AppMenu:   appmenu,
+		SvcName:   svcname,
+		SesMenu:   sesmenu,
+	}
+}
+
+func (h *Header) SetBreadcrumber(b traverse.Breadcrumber) {
+	if b == nil {
+		h.SvcName.SetText("cchat-gtk")
+		return
+	}
+
+	if crumb := b.Breadcrumb(); len(crumb) > 0 {
+		h.SvcName.SetText(crumb[0])
+	} else {
+		h.SvcName.SetText("")
+	}
+}
+
+func (h *Header) SetSessionMenu(s *session.Row) {
+	h.SesMenu.Bind(s.ActionsMenu)
+}
+
+type sizeBinder interface {
+	primitives.Connector
+	GetAllocatedWidth() int
+}
+
+var _ sizeBinder = (*List)(nil)
+
+func (h *Header) AppMenuBindSize(c sizeBinder) {
+	c.Connect("size-allocate", func() {
+		h.AppMenu.SetSizeRequest(c.GetAllocatedWidth(), -1)
+	})
+}
diff --git a/internal/ui/service/list.go b/internal/ui/service/list.go
index 466c64e..b50cf33 100644
--- a/internal/ui/service/list.go
+++ b/internal/ui/service/list.go
@@ -45,7 +45,6 @@ func NewList(vctl ViewController) *List {
 	svlist.ListBox, _ = gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
 	svlist.ListBox.Show()
 	svlist.ListBox.SetHAlign(gtk.ALIGN_START)
-	svlist.ListBox.SetHExpand(false)
 	listCSS(svlist.ListBox)
 
 	svlist.ScrolledWindow, _ = gtk.ScrolledWindowNew(nil, nil)
diff --git a/internal/ui/service/session/servers.go b/internal/ui/service/session/servers.go
index 60d3c98..9d32f89 100644
--- a/internal/ui/service/session/servers.go
+++ b/internal/ui/service/session/servers.go
@@ -8,13 +8,14 @@ import (
 	"github.com/diamondburned/cchat-gtk/internal/humanize"
 	"github.com/diamondburned/cchat-gtk/internal/ui/primitives"
 	"github.com/diamondburned/cchat-gtk/internal/ui/primitives/spinner"
-	"github.com/diamondburned/cchat-gtk/internal/ui/service/session/server/traverse"
 	"github.com/diamondburned/cchat-gtk/internal/ui/service/session/server"
+	"github.com/diamondburned/cchat-gtk/internal/ui/service/session/server/traverse"
 	"github.com/gotk3/gotk3/gtk"
 	"github.com/gotk3/gotk3/pango"
 )
 
 const FaceSize = 48 // gtk.ICON_SIZE_DIALOG
+const ListWidth = 200
 
 // Servers wraps around a list of servers inherited from Children. It's the
 // container that's displayed on the right of the service sidebar.
@@ -34,7 +35,7 @@ var toplevelCSS = primitives.PrepareClassCSS("top-level", `
 func NewServers(p traverse.Breadcrumber, ctrl server.Controller) *Servers {
 	c := server.NewChildren(p, ctrl)
 	c.SetMarginStart(0) // children is top level; there is no main row
-	c.SetHExpand(true)  // fill
+	c.SetVExpand(true)
 	c.Show()
 	toplevelCSS(c)
 
diff --git a/internal/ui/service/view.go b/internal/ui/service/view.go
index 20c2e55..ad2e7d0 100644
--- a/internal/ui/service/view.go
+++ b/internal/ui/service/view.go
@@ -23,8 +23,12 @@ type Controller interface {
 }
 
 type View struct {
-	*gtk.Box   // 2 panes, but left-most hard-coded
-	Controller // inherit main controller
+	*gtk.Box
+
+	Header *Header
+
+	BottomPane *gtk.Box // 2 panes, but left-most hard-coded
+	Controller          // inherit main controller
 
 	Services   *List
 	ServerView *gtk.ScrolledWindow
@@ -40,9 +44,9 @@ func NewView(ctrller Controller) *View {
 	view.Services = NewList(view)
 	view.Services.Show()
 
-	// Make a separator.
-	// sep, _ := gtk.SeparatorNew(gtk.ORIENTATION_VERTICAL)
-	// sep.Show()
+	view.Header = NewHeader()
+	view.Header.AppMenuBindSize(view.Services)
+	view.Header.Show()
 
 	// Make a stack for the middle panel.
 	view.ServerStack = singlestack.NewStack()
@@ -50,18 +54,21 @@ func NewView(ctrller Controller) *View {
 	view.ServerStack.SetTransitionDuration(50)
 	view.ServerStack.SetTransitionType(gtk.STACK_TRANSITION_TYPE_CROSSFADE)
 	view.ServerStack.SetHomogeneous(true)
-	view.ServerStack.SetHExpand(true)
 	view.ServerStack.Show()
 
 	view.ServerView, _ = gtk.ScrolledWindowNew(nil, nil)
 	view.ServerView.SetPolicy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
-	view.ServerView.SetHExpand(true)
 	view.ServerView.Add(view.ServerStack)
 	view.ServerView.Show()
 
-	view.Box, _ = gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
-	view.Box.PackStart(view.Services, false, false, 0)
-	view.Box.PackStart(view.ServerView, true, true, 0)
+	view.BottomPane, _ = gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
+	view.BottomPane.PackStart(view.Services, false, false, 0)
+	view.BottomPane.PackStart(view.ServerView, true, true, 0)
+	view.BottomPane.Show()
+
+	view.Box, _ = gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
+	view.Box.PackStart(view.Header, false, false, 0)
+	view.Box.PackStart(view.BottomPane, true, true, 0)
 	view.Box.Show()
 
 	return view
@@ -88,6 +95,24 @@ func (v *View) SessionSelected(svc *Service, srow *session.Row) {
 	// reference anyway. In fact, cchat REQUIRES us to do so.
 	v.ServerStack.SetVisibleChild(srow.Servers)
 
-	// Call the controller's method.
+	v.Header.SetSessionMenu(srow)
+	v.Header.SetBreadcrumber(srow)
 	v.Controller.SessionSelected(svc, srow)
 }
+
+// RowSelected is called when a row is selected. It updates the header then
+// calls the application's RowSelected method.
+func (v *View) RowSelected(srow *session.Row, srv *server.ServerRow, smsg cchat.ServerMessage) {
+	v.Header.SetBreadcrumber(srv)
+	v.Controller.RowSelected(srow, srv, smsg)
+}
+
+func (v *View) OnSessionRemove(s *Service, r *session.Row) {
+	v.Header.SetBreadcrumber(nil)
+	v.Controller.OnSessionRemove(s, r)
+}
+
+func (v *View) OnSessionDisconnect(s *Service, r *session.Row) {
+	v.Header.SetBreadcrumber(nil)
+	v.Controller.OnSessionDisconnect(s, r)
+}
diff --git a/internal/ui/ui.go b/internal/ui/ui.go
index 872a274..082404b 100644
--- a/internal/ui/ui.go
+++ b/internal/ui/ui.go
@@ -11,9 +11,9 @@ import (
 	"github.com/diamondburned/cchat-gtk/internal/ui/service/auth"
 	"github.com/diamondburned/cchat-gtk/internal/ui/service/session"
 	"github.com/diamondburned/cchat-gtk/internal/ui/service/session/server"
+	"github.com/diamondburned/handy"
 	"github.com/gotk3/gotk3/gdk"
 	"github.com/gotk3/gotk3/glib"
-	"github.com/gotk3/gotk3/gtk"
 	"github.com/pkg/errors"
 )
 
@@ -51,36 +51,40 @@ func clamp(n, min, max int) int {
 }
 
 type App struct {
-	window *window
-	header *header
+	handy.Leaflet
+	HeaderGroup *handy.HeaderGroup
+
+	Services    *service.View
+	MessageView *messages.View
 
 	// used to keep track of what row to disconnect before switching
 	lastSelector func(bool)
 }
 
 var (
-	_ gts.Window         = (*App)(nil)
-	_ service.Controller = (*App)(nil)
+	_ gts.MainApplication = (*App)(nil)
+	_ service.Controller  = (*App)(nil)
+	_ messages.Controller = (*App)(nil)
 )
 
 func NewApplication() *App {
 	app := &App{}
-	app.window = newWindow(app)
-	app.header = newHeader()
 
-	// Resize the app icon with the left-most sidebar.
-	services := app.window.Services.Services
-	services.Connect("size-allocate", func() {
-		app.header.left.appmenu.SetSizeRequest(services.GetAllocatedWidth(), -1)
-	})
+	app.Services = service.NewView(app)
+	app.Services.SetSizeRequest(leftMinWidth, -1)
+	app.Services.Show()
 
-	// Resize the left-side header w/ the left-side pane.
-	app.window.Services.ServerView.Connect("size-allocate", func() {
-		// Get the current width of the left sidebar.
-		width := app.window.GetPosition()
-		// Set the left-side header's size.
-		app.header.left.SetSizeRequest(width, -1)
-	})
+	app.MessageView = messages.NewView(app)
+	app.MessageView.Show()
+
+	app.HeaderGroup = handy.HeaderGroupNew()
+	app.HeaderGroup.AddHeaderBar(&app.Services.Header.HeaderBar)
+	app.HeaderGroup.AddHeaderBar(&app.MessageView.Header.HeaderBar)
+
+	app.Leaflet = *handy.LeafletNew()
+	app.Leaflet.Add(app.Services)
+	app.Leaflet.Add(app.MessageView)
+	app.Leaflet.Show()
 
 	// Bind the preferences action for our GAction button in the header popover.
 	// The action name for this is "app.preferences".
@@ -89,16 +93,17 @@ func NewApplication() *App {
 	return app
 }
 
+// Services methods.
+
 func (app *App) AddService(svc cchat.Service) {
-	app.window.Services.AddService(svc)
+	app.Services.AddService(svc)
 }
 
 // OnSessionRemove resets things before the session is removed.
 func (app *App) OnSessionRemove(s *service.Service, r *session.Row) {
 	// Reset the message view if it's what we're showing.
-	if app.window.MessageView.SessionID() == r.ID() {
-		app.window.MessageView.Reset()
-		app.header.SetBreadcrumber(nil)
+	if app.MessageView.SessionID() == r.ID() {
+		app.MessageView.Reset()
 	}
 }
 
@@ -119,9 +124,7 @@ func (app *App) SessionSelected(svc *service.Service, ses *session.Row) {
 	// reset view when setservers top level called
 
 	// TODO: restore last message box
-	app.window.MessageView.Reset()
-	app.header.SetBreadcrumber(ses)
-	app.header.SetSessionMenu(ses)
+	app.MessageView.Reset()
 }
 
 func (app *App) RowSelected(ses *session.Row, srv *server.ServerRow, smsg cchat.ServerMessage) {
@@ -134,12 +137,12 @@ func (app *App) RowSelected(ses *session.Row, srv *server.ServerRow, smsg cchat.
 	app.lastSelector = srv.SetSelected
 	app.lastSelector(true)
 
-	app.header.SetBreadcrumber(srv)
-
 	// Assert that server is also a list, then join the server.
-	app.window.MessageView.JoinServer(ses.Session, smsg.(messages.ServerMessage))
+	app.MessageView.JoinServer(ses.Session, smsg.(messages.ServerMessage))
 }
 
+// MessageView methods.
+
 func (app *App) OnMessageBusy() {
 	// Disable the server list because we don't want the user to switch around
 	// while we're loading.
@@ -163,7 +166,7 @@ func (app *App) Close() {
 	// Disconnect everything. This blocks the main thread, so by the time we're
 	// done, the application would exit immediately. There's no need to update
 	// the GUI.
-	for _, s := range app.window.AllServices() {
+	for _, s := range app.Services.Services.Services {
 		var service = s.Service().Name()
 
 		for _, session := range s.BodyList.Sessions() {
@@ -180,18 +183,10 @@ func (app *App) Close() {
 	}
 }
 
-func (app *App) Header() gtk.IWidget {
-	return app.header
-}
-
-func (app *App) Window() gtk.IWidget {
-	return app.window
-}
-
 func (app *App) Icon() *gdk.Pixbuf {
 	return icons.Logo256(0)
 }
 
 func (app *App) Menu() *glib.MenuModel {
-	return &app.header.menu.MenuModel
+	return app.Services.Header.MenuModel
 }
diff --git a/internal/ui/window.go b/internal/ui/window.go
index aabc5ef..5b1faa2 100644
--- a/internal/ui/window.go
+++ b/internal/ui/window.go
@@ -1,39 +1 @@
 package ui
-
-import (
-	"github.com/diamondburned/cchat-gtk/internal/ui/messages"
-	"github.com/diamondburned/cchat-gtk/internal/ui/service"
-	"github.com/gotk3/gotk3/gtk"
-)
-
-type window struct {
-	*gtk.Paned
-	Services    *service.View
-	MessageView *messages.View
-}
-
-type Controller interface {
-	service.Controller
-	messages.Controller
-}
-
-func newWindow(mainctl Controller) *window {
-	services := service.NewView(mainctl)
-	services.SetSizeRequest(leftMinWidth, -1)
-	services.Show()
-
-	mesgview := messages.NewView(mainctl)
-	mesgview.Show()
-
-	pane, _ := gtk.PanedNew(gtk.ORIENTATION_HORIZONTAL)
-	pane.Pack1(services, false, false)
-	pane.Pack2(mesgview, true, false)
-	pane.SetPosition(leftCurrentWidth)
-	pane.Show()
-
-	return &window{pane, services, mesgview}
-}
-
-func (w *window) AllServices() []*service.Service {
-	return w.Services.Services.Services
-}
diff --git a/main.go b/main.go
index 9fb37c0..cbfab7c 100644
--- a/main.go
+++ b/main.go
@@ -16,7 +16,7 @@ import (
 var destructor = func() {}
 
 func main() {
-	gts.Main(func() gts.Window {
+	gts.Main(func() gts.MainApplication {
 		var app = ui.NewApplication()
 
 		// Load all cchat services.