Skills - Diablo 4 Wiki
Skill slots in Diablo 4 are limited, so make the most of your abilities. ... Six is the maximum number of skill slots in Diablo 4.
All Item Slot Types in Diablo 4's Inventory - GINX TV
Learn about all the Diablo 4 item slots in your character's inventory to equip new items.
Diablo 4 Wiki
Diablo 4 Wiki Guide: Classes, Skills, Abilities, Enemies and more! All Diablo IV Builds, Guides, Bosses, Legendary Items, Weapons and Armor