Select: drag empty space = region select · Shift+click to add/remove
Pan: hold Space + drag, or middle-mouse drag
Rectangle / Text: drag on canvas to draw · Wheel to zoom
Drag moves selection (1 or many) · group handles scale all together
Snaps to align · hold Shift while moving = lock to one axis
Ctrl+V at the cursor: YouTube → video · website link → preview card · image URL / screenshot / drop PNG → image
Ctrl+V several links at once → a block per link · plain text → text in your last style
Article (A): draw a block to write/paste long text (crisp + translatable)
Connector (C): drag block→block = arrow · click a line to style it · double-click a line to add a bend point
Ctrl+C/Ctrl+V copy & paste selected blocks · Ctrl+D duplicate · Ctrl+G group / Ctrl+Shift+G ungroup · Ctrl+Z undo