diff --git a/tui/app.go b/tui/app.go
index 74f7f2b..37656ba 100644
--- a/tui/app.go
+++ b/tui/app.go
@@ -1,6 +1,7 @@
 package tui
 
 import (
+	"fmt"
 	"strings"
 
 	tea "github.com/charmbracelet/bubbletea"
@@ -11,13 +12,19 @@ type (
 		Size Size
 		Header HeaderModel
 		Screen tea.Model
+		Screens []tea.Model
 	}
 )
 
 func NewApp() AppModel {
+	screens := []tea.Model{
+		NewHomeScreen(),
+		NewNotificationScreen(),
+	}
 	return AppModel{
 		Header: NewHeader(),
-		Screen: NewHomeScreen(),
+		Screen: screens[0],
+		Screens: screens,
 	}
 }
 
@@ -30,7 +37,11 @@ func (m AppModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	switch msg := msg.(type) {
 	case tea.WindowSizeMsg:
-		m.Size = NewSizeFromWindow(msg)
+		m.SetSize(msg.Width, msg.Height)
+	case SwitchHomeScreenMsg:
+		m.Screen = m.Screens[0]
+	case SwitchNotificationScreenMsg:
+		m.Screen = m.Screens[1]
 	}
 
 	m.Header, headerCmd = m.Header.Update(msg)
@@ -39,8 +50,23 @@ func (m AppModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	return m, tea.Batch(cmd, headerCmd, screenCmd)
 }
 
+func (m *AppModel) SetSize(width, height int) {
+	m.Size = NewSize(width, height)
+	m.Header.SetWidth(width)
+	screenHeight := height - m.Header.Size.Height
+	switch screen := m.Screen.(type) {
+	case Sized:
+		m.Screen = screen.SetSize(width, screenHeight)
+	case SizedWidth:
+		m.Screen = screen.SetWidth(width)
+	case SizedHeight:
+		m.Screen = screen.SetHeight(screenHeight)
+	}
+}
+
 func (m AppModel) View() string {
 	return strings.Join([]string{
+		fmt.Sprintf("%d x %d", m.Size.Width, m.Size.Height),
 		m.Header.View(),
 		m.Screen.View(),
 	}, "\n")
diff --git a/tui/header.go b/tui/header.go
index e9a4973..dcb7279 100644
--- a/tui/header.go
+++ b/tui/header.go
@@ -9,13 +9,15 @@ import (
 
 type (
 	HeaderModel struct{
+		Size Size
 		Tabs []HeaderTabModel
-		Width int
 	}
 
 	HeaderTabModel struct{
-		Current bool
+		Size Size
+		Active bool
 		Name string
+		Key rune
 		Unread int
 	}
 )
@@ -23,16 +25,16 @@ type (
 func NewHeader() HeaderModel {
 	return HeaderModel{
 		Tabs: []HeaderTabModel {
-			NewHeaderTab("Home", 10, true),
-			NewHeaderTab("Notifications", 3, false),
-			NewHeaderTab("Lists", 5, false),
-			NewHeaderTab("Private", 0, false),
+			NewHeaderTab("Home", 'H', 10, true),
+			NewHeaderTab("Notifications", 'N', 3, false),
+			NewHeaderTab("Lists", 'L', 5, false),
+			NewHeaderTab("Private", 'P', 0, false),
 		},
 	}
 }
 
-func NewHeaderTab(name string, unread int, current bool) HeaderTabModel {
-	return HeaderTabModel{ Name: name, Unread: unread, Current: current }
+func NewHeaderTab(name string, key rune, unread int, current bool) HeaderTabModel {
+	return HeaderTabModel{ Name: name, Key: key, Unread: unread, Active: current }
 }
 
 var (
@@ -59,6 +61,7 @@ var (
 	}
 
 	headerTabStyle = lipgloss.NewStyle().
+		Padding(0, 1).
 		Border(tabBorder, true)
 
 	activeHeaderTabStyle = headerTabStyle.
@@ -72,43 +75,80 @@ func (m HeaderModel) Init() tea.Cmd {
 func (m HeaderModel) Update(msg tea.Msg) (HeaderModel, tea.Cmd) {
 	var cmd tea.Cmd
 
-	switch msg := msg.(type) {
-	case Size:
-		m.Width = msg.Width
+	switch msg.(type) {
+	case SwitchHomeScreenMsg:
+		m.SetActive(0)
+	case SwitchNotificationScreenMsg:
+		m.SetActive(1)
 	}
 
 	return m, cmd
 }
 
+func (m *HeaderModel) SetActive(tabIndex int) {
+	for i := range m.Tabs {
+		m.Tabs[i].Active = i == tabIndex
+	}
+}
+
+func (m *HeaderModel) SetWidth(width int) {
+	tabWidth := width / len(m.Tabs)
+	var maxTabHeight int
+	for i := range m.Tabs {
+		m.Tabs[i].SetSize(tabWidth)
+		maxTabHeight = max(maxTabHeight, m.Tabs[i].Size.Height)
+	}
+	m.Size = Size{
+		Width: width,
+		Height: 3+maxTabHeight,
+	}
+}
+
 func (m HeaderModel) View() string {
 	header := lipgloss.NewStyle().
 		Padding(1, 0).
 		Align(lipgloss.Center).
-		Width(m.Width)
+		Width(m.Size.Width)
 
 	renderedTabs := make([]string, len(m.Tabs))
 	for i, tab := range m.Tabs {
 		renderedTabs[i] = tab.View()
 	}
+	joinedTabs := lipgloss.JoinHorizontal(lipgloss.Bottom, renderedTabs...)
 
-	return header.Render(renderedTabs...)
+	return  header.Render(joinedTabs)
 }
 
 func (m HeaderTabModel) Init() tea.Cmd {
 	return nil
 }
 
-func (m HeaderTabModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+func (m HeaderTabModel) Update(msg tea.Msg) (HeaderTabModel, tea.Cmd) {
 	var cmd tea.Cmd
 	return m, cmd
 }
 
-func (m HeaderTabModel) View() string {
-	content := lipgloss.JoinHorizontal(lipgloss.Center, m.Name, fmt.Sprintf("(%d)", m.Unread))
+func (m *HeaderTabModel) SetSize(width int) {
+	m.Size = Size{
+		Width: width,
+		Height: 1,
+	}
+}
 
-	if m.Current {
-		return lipgloss.NewStyle().Underline(true).Render(content)
+func (m HeaderTabModel) View() string {
+	contentWidth := m.Size.Width - 4
+	content := fmt.Sprintf("[%c] %s - %d", m.Key, m.Name, m.Unread)
+	if len(content) > contentWidth {
+		content = fmt.Sprintf("[%c] %d", m.Key, m.Unread)
+		if len(content) > contentWidth {
+			content = fmt.Sprintf("[%c]", m.Key)
+		}
+	}
+	content = lipgloss.PlaceHorizontal(contentWidth, lipgloss.Center, content)
+
+	if m.Active {
+		return activeHeaderTabStyle.Render(content)
 	}
 
-	return content
+	return headerTabStyle.Render(content)
 }
diff --git a/tui/home.go b/tui/home.go
index 41a8e78..7fbee99 100644
--- a/tui/home.go
+++ b/tui/home.go
@@ -11,8 +11,14 @@ type (
 	HomeScreenModel struct{
 		Size Size
 	}
+
+	SwitchHomeScreenMsg struct{}
 )
 
+func SwitchHomeScreen() tea.Msg {
+	return SwitchHomeScreenMsg{}
+}
+
 func NewHomeScreen() HomeScreenModel {
 	return HomeScreenModel{}
 }
@@ -29,6 +35,8 @@ func (m HomeScreenModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		switch msg.String() {
 		case "q", "ctrl-c":
 			cmd = tea.Quit
+		case "N":
+			cmd = SwitchNotificationScreen
 		}
 	case Size:
 		m.Size = msg
@@ -37,6 +45,11 @@ func (m HomeScreenModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	return m, cmd
 }
 
+func (m HomeScreenModel) SetSize(width, height int) HomeScreenModel {
+	m.Size = NewSize(width, height)
+	return m
+}
+
 func (m HomeScreenModel) View() string {
 	header := lipgloss.NewStyle().
 		Align(lipgloss.Center).
diff --git a/tui/notifications.go b/tui/notifications.go
new file mode 100644
index 0000000..a266250
--- /dev/null
+++ b/tui/notifications.go
@@ -0,0 +1,43 @@
+package tui
+
+import tea "github.com/charmbracelet/bubbletea"
+
+type (
+	NotificationScreenModel struct{
+		Size Size
+	}
+
+	SwitchNotificationScreenMsg struct{}
+)
+
+func SwitchNotificationScreen() tea.Msg {
+	return SwitchNotificationScreenMsg{}
+}
+
+func NewNotificationScreen() NotificationScreenModel {
+	return NotificationScreenModel{}
+}
+
+func (m NotificationScreenModel) Init() tea.Cmd {
+	return nil
+}
+
+func (m NotificationScreenModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	var cmd tea.Cmd
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "q", "ctrl-c":
+			cmd = tea.Quit
+		case "H":
+			cmd = SwitchHomeScreen
+		}
+	}
+
+	return m, cmd
+}
+
+func (m NotificationScreenModel) View() string {
+	return "notification screen"
+}
diff --git a/tui/size.go b/tui/size.go
index f66bdc9..831dd29 100644
--- a/tui/size.go
+++ b/tui/size.go
@@ -2,9 +2,21 @@ package tui
 
 import tea "github.com/charmbracelet/bubbletea"
 
-type Size struct{
-	Width, Height int
-}
+type (
+	Size struct{
+		Width, Height int
+	}
+
+	Sized interface{
+		SetSize(width, height int) tea.Model
+	}
+	SizedWidth interface{
+		SetWidth(width int) tea.Model
+	}
+	SizedHeight interface{
+		SetHeight(height int) tea.Model
+	}
+)
 
 func NewSize(width, height int) Size {
 	return Size { Width: width, Height: height }