Black lines in assembly

[east]

In my part I see the nice black line around the grey, but it dissappeared in the assembly.
Now the assembly looks like one big part, while it is actually two.

Where can I find the setting to show the black lines?

Edited by: east

 

[Mihail]

View menu -> Display -> Shaded With Edges (also in the "View" toolbar)

 

[east]

Oh my, so easy, thanks Mihail!