Change label dimensions

Method 1: From the main menu choose Label | Properties.

Method 2: Deselect all objects and click on the Edit toolbar.

Method 3: Right-click on label (NOT at objects and NOT at background if it exists) and choose Properties.

Method 4: Deselect all objects and press Alt+Enter on keyboard.

Method 5: Double-click somewhere on work area (NOT at object and NOT at background if it exists).

Get label dimensions from an existing Print Layout

Method 6: From the main menu choose Label | Get From Print Layout option.

Method 7: Click on the Edit toolbar.

Method 8: Click Get From Print Layout action in the Label toolbox.