Move: You can move the entire content by holding down the left and right mouse buttons.

Fit [Fit in]: Double-click while holding down the Ctrl key. → The entire content of the sketcher is fitted exactly into the window.

Zoom rectangle: Drag a rectangle while holding down the middle mouse button.

Selection rect [Selection rectangle] angle: Hold down the Shift key and drag a rectangle with the left mouse button.

Multiple selection [Multi selection]: Hold down the Ctrl key and click on the desired elements.

Mouse wheel: Use the mouse wheel [Mouse wheel] to zoom in and out. Rotate downwards to zoom out. If you activate Reverse [Invert], it is the other way round. The position of the object changes depending on where you positioned the mouse cursor before rotating.