Camera
Hold Right-ClickEnable fly camera (locks the cursor while held)
W A S DMove forward / left / back / right (while flying)
Q / EMove down / up (while flying)
MouseLook around (while flying)
ScrollChange fly speed (while flying)
ShiftHold while flying to move faster
FSnap the camera up close to the selected shape
Selecting & Tools
Left-ClickSelect a shape
Select toolClick a shape to select it
Move toolDrag the colored arrows to move the selection along one axis
Rotate toolDrag a colored ring to rotate around that axis
Scale toolDrag a colored handle to resize along that axis
Ctrl+DDuplicate the selected shape
Delete / BackspaceDelete the selected shape
Cut Hole
Cut Hole buttonStart: click the shape to KEEP, then click the shape that CUTS it
EscCancel an in-progress hole cut
Lattice
Lattice buttonWrap the selected shape in a draggable point cage
Click a pointSelect it and drag freely to deform the shape
Shift or Ctrl + ClickAdd or remove a point from the selection, for moving several at once
Move tool (lattice)Drag the selected point(s) precisely along one axis
Ctrl+Z (in lattice mode)Undo the last point move only \u2014 does not exit the lattice
Pull ModeSelect 2+ points, toggle Pull Mode in the left panel, then click-drag anywhere \u2014 drag toward the shape to pull points in, away to push them out
Axis Lock
X / Y / ZLock movement of the current selection (shapes or lattice points) to that axis, move mouse to drag \u2014 works without holding any mouse button
Left-Click / EnterConfirm the locked-axis move
EscCancel the locked-axis move
Undo / Redo
Ctrl+ZUndo
Ctrl+Shift+Z or Ctrl+YRedo