I never like the info texts on top left and top right corners in red color as they are hard to see.   To change them into white color that I prefer, I go to [DISPLAY] section in the Prepar3D.cfg (or fsx.cfg) file. Then replace the values of

InfoUpperLeftTextColorUser, and
InfoUpperRightTextColor

from 255,0,0 (red) to 255,255,255 (white).  That’s it.
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