How do I edit the stats of characters?
Character Editor
Select the unit you want to edit and set their base stats and growth rates:
Note that these base stats are added to the base stats of their class. The Stat Calculator field can show you a unit’s average stats at a given level using the class base stats of their “Support Class” (set in the top-right), so if you set the level to view as their starting level, it will show you their base stats.
How do I edit the stats of classes?
Class Editor
Select the class you want to edit in the list and set its base stats, max stats, and enemy growths (see here for an explanation of how enemy stats work):
How do I edit the stats of weapons?
Item Editor
Select the weapon you want to edit in the list and change its stats: