You just need this: @{selected|spell_save_dc} If you pop your character sheet into a separate window, the ctrl-F search functionality will work on the Attributes & Abilities page so you can search for relevant Attributes. You can also right click an input and hit Q to 'inspect element'. This will open your HTML inspector where you can find the Attribute name in this line: <input type="number" name="attr_hp" title="@{hp}"> You just need to drop the "attr_" from the start when you're using Roll20's Attribute references (unless you're writing a sheet, really).
