Indent/Unindent - it moves text right or left on one tabulation character or some spaces (look at Preferences, Editor page). For an indent you can also use a TAB key. Both of functions works with a single line or multiply lines as well.
Append to the Crapbook - add the selection to the Crapbook. It's not important that Crapbook is opened or not - this function works in any case.
Swop - swap the selected text with a clipboard content. I.e. text from the selection moves to clipboard, and at the same time the content of clipboard is moving to the place of the selection.
Copy all - copy all text to the clipboard.
Copy current URL - before using that, you must point with cursor to the URL at your text.