I am modifying a 3D Warehouse drawing for use in my shop. When I use the Measuring Tool and try to use the Guidelines function the guidelines disappear after I hit Enter. Is there a problem in modifying warehouse drawings? I am using SketchUp Pro and my license is current.
Make sure you have (menu)View->Guides checked.
Please clarify. Are you using SketchUp 2021, or are using SketchUp Pro 2018 (as your profile says) under an old permanent license?