<p> Orthographic Viewport Shift-Q | Select all the surfaces of that brush All Viewport Modes EXCEPT the one that is currently selected LMB (on BSP brush edge) | Select BSP brush Shift-J | Select all adjacent surfaces LMB (when over actor) | Select actor Ctrl + Alt + LMB | Box Select Shift-W | Select all adjacent Wall surfaces Double-LMB or F4 (when over actor) | Open LMB or RMB + Any | Move camera in direction Shift-T | Select all surfaces with same Texture actor of mouse movement Shift-N | De-select all surfaces (select Nothing) RMB | Open context menu MMB + Any | Measure distance in game units Shift-D or Ctrl-W | Duplicate selected object LMB & RMB + Up/Down | Zoom in/out Render Modes Ctrl + MMB | Align all cameras at current All Viewports - object selected Alt-1 | Brush wireframe render mode camera position Alt-2 | Wireframe render mode Del | Delete current object Alt-3 | Unlit render mode LMB (not hovering over anything) | De-select Ortho Viewport - object selected Alt-4 | Lit render mode current object Alt-5 | Lighting Only render mode Shift + drag actor with movement widget | Ctrl + LMB + Any | Move selected object Alt-6 | Lighting Complexity render mode Move viewport while moving actor Ctrl + Shift + LMB + Any | Move selected Space bar | Cycle between xyz movement object and viewport camera widget(standard), rotation widget and free- Ctrl + RMB + Any | Free rotate selected object Builder Brush-Specific scaling widget Cursor keys | Nudge position of selected Alt + drag actor with movement widget | Ctrl-A | Add brush actor(s) Create duplicate of selected actor and move it Ctrl-S | Subtract brush RMB (on brush vertex) | Change brush origin to Non-Orthographic Viewport Ctrl-I | Intersect brush selected vertex Ctrl-D | De-Intersect brush Home | Align all viewport cameras to selected LMB + Any | Yaw (L/R) and move forwards/ actor backwards (U/D) Camera Bookmarks Shift + Home | Align only the active viewport RMB + Any | Free camera movement Ctrl-number | Bookmark the current camera camera to selected actor LMB & RMB + Any | Slew camera up & down position. End | Snap selected actor to floor (Z axis) or left & right (along relative X axis) number | Move cameras to the specified Ctrl + End | Move selected actor back to grid LMB (on BSP brush) | Select brush surface position bookmark. lines. Ctrl + Shift + LMB (on BSP brush) | Select Ctrl-G | Select all other actors belonging to the BSP brush Maya camera tools same groups as the currently selected actors. Alt + RMB (when hovering over brush face) | Alt + Cursor keys | Nudge position of selected Copy surface texture to "texture clipboard" LMB + Any | Orbit around the selected actor or actor(s) Alt + LMB (when hovering over brush face) | view M | Makes the level of the selected actors Paste (apply) texture to surface MMB + Any | Pan camera current. Shift + Alt + LMB (when over brush face) | RMB + Down | Zoom camera out Ctrl + M | Moves selected actors to the current Paste (apply) texture to multiple selected brush RMB + Up | Zoom camera in level. surfaces Ctrl + Alt + LMB (when over brush face) | Advanced Shortcut Keys Editor Modes Paste (apply texture and texture coordinates to surface A + LMB | Add the currently selected actor Shift-1 | Camera Mode - default editor mode Cursor keys | Nudge camera position B | Toggle builder brush on/off Shift-2 | Geometry Mode - edit BSP brushes C | Toggle collision cylinders on/off Shift-3 | Terrain Mode - create and manipulate When a brush surface is selected D | Toggles viewport realtime mode on/off terrain D + LMB | Place material in the world as a decal Shift-4 | Texture Panning Mode - use in Shift-B | Select all surfaces on that Brush E | Toggles decals on/off combination with surface properties to align BSP Shift-S | Select all brush Surfaces in the level F | Toggle fog on/off textures G | Toggles “playing in game” view H | Toggle "Show BSP and lighting only" mode K | Toggle kismet reference boxes on/off L + LMB | Place light actor at selected location N | Toggle navigation nodes on/off O | Toggle volumes on/off Q | Toggle BSP on/off R | Toggle light/audio radius visualization on/off S + LMB | Place static mesh in the world T | Toggle terrain on/off W | Toggle static and skeletal meshes on/off Ctrl + P | Copy selected polygons to builder brush Ctrl-R | Toggle realtime viewport update Shift-A | Select everything F4 | View Actor Properties F5 | View Surface Properties Mousewheel | Zooms selected viewport in/out . + LMB | Place pathnode at selected location [ | Lower grid size ] | Raise grid size </p>