ART - screen editing function doesn't transfer over to Preview Simulation and Publishing

Hi, 

I struggle with the ART screen editing functionality which doesn't seem to carry over to the Preview Simulation and Publishing.

In my open file in ART I move to the Documents view and right click on a step. I select screen and then edit.

I want to take the lower part of the screen off which shows a Micro Focus URL that comes from hitting a link in the application I take the recording on. I drag the lower handle in the middle upwards, above the URL I don't want to show on the screen. I do the same on the right hand side to cut off a scroll bar.

This step still shows the URL in the video and so does the scroll bar to the right:

What am I doing wrong?

Thanks!