Use the left toolbar to draw shapes (rectangle, circle, diamond), add text, or draw freehand lines.

Select the Arrow tool, then drag from one shape to another to draw a connector between them.

Hold Cmd/Ctrl while resizing a shape to lock its aspect ratio and keep it proportional.

Create and switch between canvas tabs using the bar at the top of the viewport.

Click the clock icon in the toolbar to browse and restore previous snapshots of your canvas.