Mod: VehicleInspector
... / LS19 / modsSettings / VehicleInspector / vehicleInspectorSettings.xml

with notepad++ on line 16
<txtSize float="0.010000"/>
this is for changing textsize

before starting game put on line 4 rebootXmlESC="false" to rebootXmlESC="true"

Then ingame by pressing ESC you can see the changes, you can tab out of the game and adjust, go back ingame press ESC and see how it looks, once to your liking do not forget to close game and put rebootXmlESC="true"
back to
rebootXmlESC="false"

Hope this helps you out a bit