Undo

Undoes the last change you made to the text of the currently selected item

Redo

Redoes the last undo that you made.

Cut/Copy/Paste

Does just what you would think it would do.

Find/Replace...

Brings up the Find/Replace window which allows you to search for text in the currently selected class file and optionally replace it with something else.

Find Again

Searches again for the last thing found. If there is no search string, the Find/Replace window is displayed.

Find Selection

Copies the selected text to the Find/Replace dialog and executes a Find command.

Select All

Selects all the text of the item currently being edited.