@lhoggeth
In similar situations, I have sometimes had to try all of the options under the "Override" box at the bottom of that Dialog, and see which one gave me the best results. I think a lot depends on the settings of your monitor. I use three monitors, and the two big ones I have are very different from the laptop screen, so I have to adjust this override if I open Inventor on the laptop versus moving it up to one of the big monitors. So... try all of the settings in there and see if one of them makes it easier to see the icons. Good luck!
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Chris Benner
Community Manager - NAMER / D&M