Keyboard and mouse

Keyboard

KeysAction
Ctrl+KCommand palette (every command)
Alt+NNew model (Ctrl+N is reserved by browsers)
Ctrl+OOpen model
Ctrl+SSave now (autosave is on)
Ctrl+Shift+SSave as copy
Ctrl+ZUndo
Ctrl+Y, Ctrl+Shift+ZRedo
F5Run analysis (every combination with the envelope)
Ctrl+PPrint the report
F1User manual
Del, BackspaceDelete the selection (nodes take their members with them)
EscEnd the member chain, leave the tool, clear the selection, close a dialog
Ctrl+ASelect all
N, M, P, SNode, member, plate, select tool
FFit the view
ZZoom to the selection
+ / −Zoom
LLoad on the selection: nodal load (nodes), distributed load (members), area load (plates)
Ctrl+DDuplicate the selection (Copy with an offset)
Ctrl+RRun the steel design (AISC 360)
G, RMove gizmo, rotate gizmo
Tab, Shift+TabIn the 3D view: select the next / previous node, member or plate
Numpad 7, 1, 3, 0Top, front, right, iso view; with Ctrl: bottom, back, left. Numpad 5: orthographic; 4 / 6 orbit; 8 / 2 tilt; . zoom to the selection
EnterFinish a triangle plate; confirm a dialog (runs its main button); finish a pick
Backspace (pick mode)Remove the last picked point

In the tables: arrows move, type or F2 / Enter edits, Ctrl+C copies the selected rows, Ctrl+V pastes a block from a spreadsheet.

Mouse

GestureAction
ClickSelect (Shift adds, Ctrl toggles, Ctrl+Shift removes)
Left dragBox select: left to right = inside the box, right to left = crossing
Right dragOrbit (View ▸ Left-drag orbits for trackpads)
Middle drag, Shift + right dragPan
Wheel, pinchZoom to the cursor
Double-click empty spaceFit the view
Shift + wheelTurntable: turn the model about the vertical axis, 10° per notch (View ▸ Viewport settings)
View cubeClick a face for that view
Nav ringArrows around the cube orbit 45° and tilt 30°; ⟳ spins the model like a turntable
Pick modeA form's Pick button: click nodes (vertex), points on members (edge) or plates (face) in the view; Enter finishes, Esc cancels