Can’t move or delete an imported body.

Hello everybody
I’m creating sketch / square body then also imported new stl body into current sketch but now can’t move delete or anything to the imported body.

I’m not sure what other information to include since this website tells me new users can not post of upload attachments

You’re importing the STL body into the project, not the sketch. Exit the sketch and click on the imported body from the left panel to move it:

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