Viewport locked. How to unlock?

[dozingkat]

I cant edit in this mode ,how to exit this mode ?

[de_lay.dsp]

Have you resolved this problem? A quick fix might be just to reload the project. UE4 defaults to a specific viewport upon opening a project.

[Dovahkiin_Lord]

1. Create a new Viewport window (found in “Windows” → “Viewports”).
2. Then delete the old or new viewport.

Fixed the issue on my end.