Posted by dellus on Jul 26, 2020; 5:25pm
URL: https://forum.librecad.org/File-created-a-plan-view-when-opened-now-I-cannot-delete-modify-trim-or-modify-It-is-acting-like-an--tp5719300p5719301.html

Can you select single elements? If not, but always the whole drawing is selected, you might accidentally have made a block of it. Explode it. Was it created in LibreCAD?
Oh no, better clue: You have locked the layer/s. Lock symbol in Layer List black then.