Why don't the freestyle lines show in the rendered image? I wanted to utilize freestyle for technical drawing, so I followed some simple tutorials. I activated the Freestyle checkbox in the Render menu, also activated the lineSet in the Render Layers menu. I hit F12, and I expected to see the edge lines in the rendered image, but alas, nothing. I used a simple white cube for testing purposes. 

Can you help me? What did I miss?

All the best
Twerp

PS: Here is the file:  (https://blend-exchange.giantcowfilms.com/b/2422/)
Because (probably accidentally) you clicked on Exclusive, and now no edges are marked for inclusion. Click on inclusive, and you will see immediately some edges.



EDIT This is the result: