I've created a single slide presentation on my MacBook to be used as a poster in Microsoft PowerPoint. I created several charts in Excel that I COPIED into the PowerPoint slide. The charts are bar graphs with the values represented. Every TIME I change the font size of the bar values to 24 font, the file changes them back to 10 point whenever I close it and REOPEN it. This happens to all the data values in the all the charts. The font on the x and y axis stays the same, 24 point, and does not SHIFT back to 10 point, nor do the font sizes in the rest of the slide change. Does anyone have suggestion on how I can stop the file from altering my font? It's very frustrating b/c 10 point is way too small to read on a giant poster Your input is much appreciated. Thanks. What version of PowerPoint are you using? Since version numbers of PowerPoint and MS Office are different for Mac systems than for WINDOWS, do you know Windows version, e.g. Office 2003, Office 2007, Office 2010, your Mac version is equivalent to?