diff --git a/python3/vimspector/debug_session.py b/python3/vimspector/debug_session.py
index 03874f3..e3f5530 100644
--- a/python3/vimspector/debug_session.py
+++ b/python3/vimspector/debug_session.py
@@ -661,6 +661,18 @@ class DebugSession( object ):
     vim.command( 'tab split' )
     self._uiTab = vim.current.tabpage
 
+    mode = settings.Get( 'ui_mode' )
+
+    if mode == 'auto':
+      mode = 'vertical' if vim.options[ 'columns' ] < 160 else 'horizontal'
+
+    if mode == 'vertical':
+      self._SetUpUIVertical()
+    else:
+      self._SetUpUIHorizontal()
+
+
+  def _SetUpUIHorizontal( self ):
     # Code window
     code_window = vim.current.window
     self._codeView = code.CodeView( code_window, self._api_prefix )
@@ -701,6 +713,66 @@ class DebugSession( object ):
     # TODO: If/when we support multiple sessions, we'll need some way to
     # indicate which tab was created and store all the tabs
     vim.vars[ 'vimspector_session_windows' ] = {
+      'mode': 'horizontal',
+      'tabpage': self._uiTab.number,
+      'code': utils.WindowID( code_window, self._uiTab ),
+      'stack_trace': utils.WindowID( stack_trace_window, self._uiTab ),
+      'variables': utils.WindowID( vars_window, self._uiTab ),
+      'watches': utils.WindowID( watch_window, self._uiTab ),
+      'output': utils.WindowID( output_window, self._uiTab ),
+      'eval': None # this is going to be updated every time eval popup is opened
+    }
+    with utils.RestoreCursorPosition():
+      with utils.RestoreCurrentWindow():
+        with utils.RestoreCurrentBuffer( vim.current.window ):
+          vim.command( 'doautocmd User VimspectorUICreated' )
+
+
+  def _SetUpUIVertical( self ):
+    # Code window
+    code_window = vim.current.window
+    self._codeView = code.CodeView( code_window, self._api_prefix )
+
+    # Call stack
+    vim.command(
+      f'topleft { settings.Int( "topbar_height" ) }new' )
+    stack_trace_window = vim.current.window
+    one_third = int( vim.eval( 'winwidth( 0 )' ) ) / 3
+    self._stackTraceView = stack_trace.StackTraceView( self,
+                                                       stack_trace_window )
+
+
+    # Watches
+    vim.command( 'leftabove vertical new' )
+    watch_window = vim.current.window
+
+    # Variables
+    vim.command( 'leftabove vertical new' )
+    vars_window = vim.current.window
+
+
+    with utils.LetCurrentWindow( vars_window ):
+      vim.command( f'{ one_third }wincmd |' )
+    with utils.LetCurrentWindow( watch_window ):
+      vim.command( f'{ one_third }wincmd |' )
+    with utils.LetCurrentWindow( stack_trace_window ):
+      vim.command( f'{ one_third }wincmd |' )
+
+    self._variablesView = variables.VariablesView( vars_window,
+                                                   watch_window )
+
+
+    # Output/logging
+    vim.current.window = code_window
+    vim.command( f'rightbelow { settings.Int( "bottombar_height" ) }new' )
+    output_window = vim.current.window
+    self._outputView = output.DAPOutputView( output_window,
+                                             self._api_prefix )
+
+    # TODO: If/when we support multiple sessions, we'll need some way to
+    # indicate which tab was created and store all the tabs
+    vim.vars[ 'vimspector_session_windows' ] = {
+      'mode': 'vertical',
       'tabpage': self._uiTab.number,
       'code': utils.WindowID( code_window, self._uiTab ),
       'stack_trace': utils.WindowID( stack_trace_window, self._uiTab ),
diff --git a/python3/vimspector/settings.py b/python3/vimspector/settings.py
index 9ad9e41..e9e76ea 100644
--- a/python3/vimspector/settings.py
+++ b/python3/vimspector/settings.py
@@ -20,11 +20,20 @@ from vimspector import utils
 
 DEFAULTS = {
   # UI
-  'bottombar_height':  10,
-  'sidebar_width':     50,
-  'code_minwidth':     82,
-  'terminal_maxwidth': 80,
-  'terminal_minwidth': 10,
+  'ui_mode':            'auto',
+  'bottombar_height':   10,
+
+  # For ui_mode = 'horizontal':
+  'sidebar_width':      50,
+  'code_minwidth':      82,
+  'terminal_maxwidth':  80,
+  'terminal_minwidth':  10,
+
+  # For ui_mode = 'vertical':
+  'topbar_height':      15,
+  'code_minheight':     20,
+  'terminal_maxheight': 15,
+  'terminal_minheight': 5,
 
   # Signs
   'sign_priority': {
diff --git a/python3/vimspector/terminal.py b/python3/vimspector/terminal.py
index 6ffd56a..305c8ff 100644
--- a/python3/vimspector/terminal.py
+++ b/python3/vimspector/terminal.py
@@ -23,7 +23,16 @@ def LaunchTerminal( api_prefix,
   env = params.get( 'env' ) or {}
 
   term_options = {
-    'vertical': 1,
+    # Use a vsplit in widw mode, and a horizontal split in narrow mode
+    'vertical': (
+      # Use a vsplit if we're in horizontal mode, or if we're in vertical mode,
+      # but there's enough space for the code and the terminal horizontally
+      # (this gives more vertical space, which becomes at at premium)
+      vim.vars[ 'vimspector_session_windows' ][ 'mode' ] == 'horizontal' or
+      vim.options[ 'columns' ] >= (
+        settings.Int( 'terminal_maxwidth' ) + settings.Int( 'code_minwidth' )
+      )
+    ),
     'norestore': 1,
     'cwd': cwd,
     'env': env,
@@ -50,13 +59,23 @@ def LaunchTerminal( api_prefix,
     # If we're making a vertical split from the code window, make it no more
     # than 80 columns and no fewer than 10. Also try and keep the code window
     # at least 82 columns
-    if term_options[ 'vertical' ] and not term_options.get( 'curwin', 0 ):
+    if term_options.get( 'curwin', 0 ):
+      pass
+    elif term_options[ 'vertical' ]:
       term_options[ 'term_cols' ] = max(
         min ( int( vim.eval( 'winwidth( 0 )' ) )
                    - settings.Int( 'code_minwidth' ),
               settings.Int( 'terminal_maxwidth' ) ),
         settings.Int( 'terminal_minwidth' )
       )
+    else:
+      term_options[ 'term_rows' ] = max(
+        min ( int( vim.eval( 'winheight( 0 )' ) )
+                   - settings.Int( 'code_minheight' ),
+              settings.Int( 'terminal_maxheight' ) ),
+        settings.Int( 'terminal_minheight' )
+      )
+
 
     buffer_number = int(
       utils.Call(