So I’m trying to recreate a staff my DM made on paper that would give me +1 to necrotic spells and +1 to all spell damage. I can’t seem to figure out how to add it to spells and not melee attacks with the staff. Are their any tutorials I could watch to find out. 

That’s because it isn’t possible. There is no modifier you can use to add +1 to all spell damage. You’re just gonna have to do one of two things:

1. Individually customize all your character’s spells directly on your character sheet to adjust all of their damages by +1.
2. Remember to add 1 to all your spell damage rolls.

If you’re playing a caster that doesn’t prepare spells (Bard, Ranger, Sorcerer, or Warlock), that first option would be the way I would do it. Adjust them all up by 1 now and remember to do it for the new spells as you learn them at level ups and your done. 👍 If you are playing one of the casters that does prepare spells, then you’re gonna have to remember to do it every time you swap spells after a rest. 🙄

Ah okay that makes sense. Thanks just making sure I didn’t miss anything when looking through it all.