Press.
Mark the object you want to scale with the frame.

Select „Vergrößern/Verkleinern“ in the popup window.
The
complete apparatus is sized by turning the wheeel in the menue bar.
Hints:
Multiple
marked objects have a violet instead of a yellow point.
It is
not recommended to scale a complete apparatus with the mouse.
Activate the work area by clicking on the arrow.

Go with the mouse cursor to
the upper blue point.
The mouse cursor gets a new
shape.
Move the mouse while the left
button is being pressed and the object rotates.