|OUTDATED: The information on this page was removed during development and is no longer present in Diablo III.|
A Skill Tree is a kind of a categorized spellbook where you can see what skills are available to your character. It has three tabs at the right side. Clicking on the tab will take you to the corresponding skill tree.
The tree consists of rows of skills. The row indicates the level requirement to acquire the skill. The first (top) row of skills are available as soon as you create your character. The second row has a level requirement of 6, with each following row's level requirement increasing by 6, up to 30 for the bottom row.
Some skills have one or more arrows pointing to them. Any skill on the tree that points to another skill is a prerequisite. There is always at least one skill available on each tier of a character's tree.