AutoCAD - Can't Zoom Viewport? Don't Panic - It is Locked!

If you cannot Zoom inside a viewport in your AutoCAD drawing, look for the viewport and list it in Properties. If the Display Locked property says Yes, Change it to No.

It is a good idea to Lock your viewport if you want to protect the scale of your views. This is especially helpful for large site plans or if recovering your view will be difficult.

It can be confusing, however, to receive a drawing with a locked viewport, if you are not familiar with this feature. When the viewport is locked, zooming inside MS zooms the entire drawing. Just unlock it!