Shrunk font in Impress while presenting

I am using Windows 10 and Libre Office Version: (x64) Build ID: 60bfb1526849283ce2491346ed2aa51c465abfe6

I have a page number at the top right of each slide as you can see below. While presenting the font squishes together and become unreadable (see the green rectangle for the presented view)

Any idea as to what is going on and how to fix the problem?

IF your page number is a separate text box, make sure that the size of the text box fits on the slide. If a text object extends past the margins of the slide, it appears that Impress tries to fit the entire box on screen and compresses the text to do that.

Thank you. That corrected the problem. Is there a setting in Impress to prevent that behavior? Sometimes I like to have boxes with some text off the screen and move the box onto the screen.