I can't visualize planes or drawing. Maybe I changed something unintentionally, and now I don't know how to come back.
In the first photo you can't see the 3 planes neither the sketch, but in the second one, selecting all the screen with my mouse, I can check that there is the sketch, but it's not visible
Anyone knows about it? Thanks

Edu ​​​​​​​Part Design ​​​​​​​