Note from Twofer:
These reference guides originally appeared on: Wolf's Unreal Engine Editing site.


----- Special mouse clicking combinations -----

A + right mouse click: Add actor there.
L + right mouse click: Add light there.

----- Shortcut keys -----

Delete: Delete selected actors.
1, 2, 3: Slow, medium, and fast movement speed.
F1: Help.
F4: Actor properties.
F5: Surface properties.
F6: Level properties.
F7: Compile changed scripts.
F8: Rebuilder.
B: Toggle brush visibility in the current viewport.
H: Toggle actor visibility in the current viewport.
P: Toggle player controls or realtime update of the viewport.
Shift-A: Select all actors.
Shift-B: Select all surfaces belonging to the selected surfaces' brushes.
Shift-C: Select adjacent coplanar polygons.
Shift-D: Duplicate selected actors.
Shift-F: Select adjacent floors.
Shift-G: Select surfaces belonging to the selected surfaces' groups.
Shift-I: Select surfaces with items matching the selected surfaces' items.
Shift-J: Select all adjacent surfaces(flood-fill).
Shift-L: Look ahead in the current viewport (no pitch or roll).
Shift-M: Memorize selected surfaces.
Shift-N: Select none.
Shift-O: Select surfaces from intersection of selected surfaces and memory.
Shift-P: Select all surfaces.
Shift-Q: Reverse the set of selected surfaces.
Shift-R: Recall memorized surface selection.
Shift-T: Select all surfaces which use the current texture.
Shift-U: Select union of selected surfaces and memorized surfaces.
Shift-W: Select adjacent wall surfaces (flood-fill).
Shift-X: Select exclusive or of selected surfaces and memorized surfaces.
Shift-Y: Select adjacent slanted surfaces.
Shift-Z: Select none.
Ctrl-A: Add brush to world.
Ctrl-B: Load brush.
Ctrl-C: Copy.
Ctrl-D: Deintersect brush with world.
Ctrl-E: Save as.
Ctrl-L: Save level.
Ctrl-O: Load level.
Ctrl-P: Play level.
Ctrl-N: Intersect brush with world.
Ctrl-R: Redo.
Ctrl-S: Subtract brush from world.
Ctrl-V: Paste.
Ctrl-W: Duplicate.
Ctrl-X: Cut.
Ctrl-Z: Undo.

This is the Tool Bar with its Icon's labeled

Move camera Zoom camera Add brush to world Rotate brush Shear brush Subtract brush from world Scale brush Stretch brush Brush intersection Snapscale brush Select all polys Brush deintersection Select all actors Select actors inside brush Add special brush Select none Invert actor selection state Add movable brush Replace selected brushes Replace selected nonbrush actors Build a cube Undo last operation Redo last operation Build a sphere Pan textures Rotate textures Build a cylinder Drawing region: selected actors Drawing region: off Build a cone Hide selected actors Drawing region: brush Z(depth) Build a stair Nothing Toggle vertex snap Build spiral stair Get help Camera speed Build curved stair Toggle grid Toggle rotation grid Build a sheet

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