Mouse button

This ...

Does this ...

Left

Click in workspace or click an element

Places and snaps to points in the workspace.

Ctrl+click

Places points in exact alignment with existing points (linear snap).

Shift+click

After having placed the first point, you can create more points so that they are orthogonal (if Enter at right angles or Enter using cursor snap is not selected in the dialog line).

Middle

Double-click

Selects the display scale so that you can see all visible elements in their entirety.

Click and drag

Pans in the active viewport.

Shift+click and drag

Pans in the active viewport.

Ctrl+click and drag

Zooms in.

Alt+click and drag

Zooms dynamically (cursor = center). Move the cursor up to zoom in; move the cursor down to zoom out.

Right

Click in the workspace

Opens the shortcut menu for entering points.

Confirms the entry when requested in the dialog line: <confirm>

Click a toolbar

Closes a tool (= Esc key).