Hello Michael,
thanks for your reply! That's much appreciated.

The Hide Button helps a lot.

Quote: "Another way you can select objects contained within others is to use window select - that's where you click the mouse down in empty space and drag out a selection window."

But this way I can never only select the part that is inside the other. If I start dragging in empty space it (of course) also selects the outer part.

Thank you,

Pierre