Incoming changes tree - presents items which contain incoming changes. This includes resources modified and committed by others or resources newly added or newly deleted from the repository.

Outgoing changes tree - presents resources with outgoing changes meaning that they have been modified locally or have been added or deleted from your working copy.

Incoming - Outgoing tree - includes all the resources with incoming and outgoing changes

Conflict tree - includes resources with conflicting state meaning they contain both incoming and outgoing changes (pseudo-conflicting state) or they are in a state of real conflict.