[tetris11]

Do not underestimate the usefulness of the context-based menu bar. It will save you an apropos on many occasion, and open your mind to new actions that you missed on the first skim of the package methods.

[a_e_k]

If you've turned off the main menu bar, it becomes available as a popup with ctrl right-click.

(I too turn off the menu bar, but it's really helpful for accessing some of the more obscure operations in Calc.)

[donatzsky]

It's also available through F10.