You can set up buttons on the Experience window to toggle any of these windows:
Community (Friends list)
Knowledge (Spell book)
Welcome to EQII
Gear Buff Macros
NPC Spell Monitor
Go into Edit Mode by clicking the Edit button down at the right end of the XP bar and then make choices as shown here:
Then click the edit button again to get out of Edit Mode. If you don't want to use the XP bar for this, there is also a floating Nav bar that has its own set of icons you can use for this purpose. The floating Nav bar is technically part of the XP bar, so you can turn it on/off from the XP bar page of the Window Manager. While in Edit Mode you can set up these icons the same way as above.