Hello ,
I am unclear as to what exactly you are trying to achieve. I have a few questions to help narrow down what issue it is that you are experiencing.
Quick questions?
- When you say that you lock the viewport, do you mean that you lock the camera in place, that you lock the mouse to viewport, or something else?
- What exactly do you have the ‘F’ key doing?
- Can you provide a screen shot of the blueprints that are involved in your issue?
- Can you reproduce this in a clean project?
- If so, can you provide an accurate set of steps to reproduce this issue on our end?