I'm in need of some guidance as to how to adjust my 8th level Hexblade's character sheet to add a third spell slot; a boon from my patron having completed a major quest, 8 levels in the making. Am I able to customise the Spells section and add this somehow?

Thanks in advance for any suggestions.

I do not believe beyond has that capability.

I did wonder if that is the case.

 You might be able to create a Homebrew feat that does this, I think. I haven't tried it, but under Modifiers there is a Spell Slot Increase choice.

On second thought, that might not mean what I thought it meant. There might still be a way using Homebrew, though.

Have your patron gift you a ring of spell storing. Not quite as good as a spell slot, but it doesn’t require homebrew