⌘ K	Search everything
?	This list
Esc	Close a panel or deselect
← → ↑ ↓	Walk along the flow, shape by shape
Home, End	Jump to the start or the end
+, −, 0	Zoom in, out, fit
Enter	Edit the selected shape (edit mode)
Backspace	Remove the selected shape (edit mode)
⌘ Z, ⇧ ⌘ Z	Undo, redo (edit mode)
⌘ S	Save as a new version (edit mode)

On the canvas, click a shape first so the keys apply to it.