IDE Keyboard Short Cuts

Are there any keyboard shortcuts that do the following in the IDE:

  1. Activate the “Back” or “Forward” methods that are used when pressing the back or forward buttons in the top left corner of the IDE
  2. Hide the pane at the bottom that shows Find, Errors & Messages

Also unrelated, but what is the purpose of the following menu items?:
View> Zoom In
View> Zoom Out
They are always greyed out for me.

I have the same question about View -> Zoom In and View -> Zoom Out. Always seem to be grayed out for me also.

And it would be great if Esc would close the bottom Search|Errors|Messages panel while editing source code.