I have had problems with the Display locked function. I lock the viewport in the "Sheet", applying Display Locked = Yes and I use it normally (the viewport is locked, preventing zoom with the mouse, everything ok so far). I save the file and close it. After reopening the file, the viewport is unlocked, showing Display Locked = No and allowing the viewport to zoom. Can anyone instruct me how to keep the display locked after saving and closing the file?

Anyone can help us with this? It's a BUG?

Please, someone in DraftSight development team can help?