… very useful function but works in native format (I think

I can not force PL4 to full screen in changed format. The native format is 1920x1080. I need 1080x1920. This function formats the panel to native (the image cuts and returns to the native format).
Is it my ignorance or PL4 working only in native formats?
If so, how to protect the panel from reducing scrolling, before minimizing, closing etc. on the screen?
Each suggestion expected. thx.
piksys50
NY,USA