IMPRESS from LibreOffice 6.4.5.2 keeps changing my Master Slide. I have spent hours creating a Master Slide. I saved it to one of my directories under FILENAME.pptx. I have to use that format as the conference organizers require that format. I rebooted my PC and reopened IMPRESS. Now I find that I have lost much of my formatting. IMPRESS seems to have a mind of its own. I do not want it to do anything I don't specify. I don't want to to adjust fit, position, font and font size, etc.

Why can't the developers of IMPRESS let us make the slides the way we want?

John