There's a FAQ on this you can find at
http://www.wowinterface.com/forums/s...ad.php?t=21010
In addition to the comments in the FAQ, and more directly in response to your question, you can alter the size of the fonts on the health and power bars, etc., with fair ease. You would need to edit the appropriate configuration file in [
Interface > AddOns > nUI > Layouts > Default > HUDLayouts ] for text related to HUD elements and [
Interface > AddOns > nUI > Layouts > UnitPanels ] for the unit frames.
This is not Lua programming and not something you need to be afraid of. You can edit the files with any text editor, as well, like Notepad. You just have to locate the correct file and the correct section in the file and the best bet there is to just look around at the various files and look in the files to see what they contain. Odds are you'll understand it pretty quickly and if you're unsure, just ask about what you specifically are trying to do and I can get you a direct answer... I would have to write a book to tell you how to do it in generic terms.
That said, as an example, if you wanted to change the size of the health bar fonts for the target in the Player/Target frame, you would edit the file [
Interface > AddOns > nUI > Layouts > Default > HUDLayouts > PlayerTarget > nUI_HUDSkin_PlayerTarget_Target.lua ] and locate the
["Health"] section that file. In that you will find entries for the
cur_health,
max_health and
pct_health. Each of those will contain a value called "
font_size" -- making that value bigger will make the font bigger and visa versa.
You can even edit the file while you're logged in... change a value, save it, then do a '/nui rl' to reload the UI and see if you like the result. If you don't, change the value again, rinse and repeat until you're happy.