I would like to know if there is an easier way to remove sketch entities outside a closed contour. At this moment i'm doing it all by hand with power trim and trim outside, but perhaps there is an easier way to do this. I've added an example. It's the layout of a city and it is send to me as a DXF with a lot of unnecessary surroundings. (I've already trimmed most of the surroundings in the given example, but as you can see there are stil some lines outside my desired boundarys)
I want to have all details within the circle. Is there an option i don't know about which deletes all entities outside my circle?