Ninefingers
Villager
The calculation adds all racial, class, feat and level gains and magical modifiers. In your case you get +2 racial modifier to Dexterity from the Elf race and +1 modifier to Intelligence from the High (Elf) subtract. All the details are shown in the details to the right of the abilities section. So for Dexterity your roll is 16, you get +2 racial modifier (and no other modifiers as yet) so you have 18 which is a +4 ability modifier (which you had to ability rolls for Dexterity based skills, saving throws, attacks etc)
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Also I noticed you've put values in the proficiency bonus adjustment and initiative adjustment, these are used to adjust (increase or decrease) those values. Only use these if you have any magical item or your DM allows the adjustment. The character sheet will pretty much do everything for you regarding calculations and only show or highlight information that your character meets the requirements for. (a good example is you won't see Agonizing Blast until you've chosen Eldritch Blast in the Warlock Invocations). Most (if not all) dropdown list auto adapt to what the users has selected and any cells will highlight a light yellow when they require user input.
Hope that helps, if you've got any other questions or issues post them here! Have fun!
Many thanks for the prompt reply, it is appreciated. I guess I just don't see it as intuitive for someone who has not touched the d20 game system in 30 years
