Insert
Click a block in the palette, or drag it onto the canvas.
Select
Click a block to select it. Drag to move.
Shift-click another block to add it to the selection.
Click-drag empty canvas to draw a marquee — every block it touches is selected.
Hold Shift while drawing the marquee to add to the existing selection.
Edit
Double-click a text block to edit its content inline.
Drag the corners of the selection to resize.
Arrow keys to nudge (Shift = bigger step).
Multi-select
With 2+ blocks selected, the right panel shows Align, Distribute, Group, and Delete buttons.
To ungroup: select the group, click Ungroup in the properties panel.
Shortcuts
⌘Z undo · ⌘⇧Z redo
⌘C / ⌘V / ⌘X copy / paste / cut
⌘D duplicate · Del delete