You can refine your font data from the top-left wrench icon Font Settings:
Tap on Metrics to change the base values
Tap on Info to change the text values
Font Metrics
Slide to adjust the spacing between characters & words
Tap to adjust Spacing or Kerning
Slide to adjust the base metrics:
Ascender — sets the top line above all characters, including accented ones
CapHeight — sets the top line of capital letters, usually based on the H
xHeight — sets the top line of lowercase letters, usually based on the x
Descender — sets the bottom line below all characters, usually on the p
Font Infos
Family name — the name of your typeface (be original and beware of copyrights)
Style name — the visual type—currently not customizable
Designer — your name (or the one of the creators)
Designer website — the URL to learn more
Copyright — any copyright information
License — how the font may be legally used
License website — where additional licensing information can be found
Description — extra details about the typeface
This information is accessible to any end user:
On Mac, from the Font Book app, just select View > Show Info Pane
On Windows, from the Explorer app, right-click the font file, click Properties > Details