Navigating the canvas
The canvas is (virtually) infinite.
To move around on the canvas, click and drag anywhere on the canvas (not on a component).
To zoom in or out on the canvas, use the scroll wheel off your mouse.
If you get lost on the canvas, click on the Fit all icon in the menubar to bring all content visible in the center of the canvas.
Click on a component to select it.
To deselect a component, click anywhere on the canvas, hit ESC or click on another component.
To select multiple components, hold down SHIFT while you click on a component. To deselect from a group click it again.
Alternatively, hold down SHIFT and click and drag to select multiple components.