OmniOutliner has an Undo stack. That means that the application remembers what actions you have taken recently and can undo them. Select this item to go back one step in your editing. Keep selecting it to keep stepping backwards.

Redo is even more circumspect than Undo. This command is only available when the most recent thing you did was to undo an action. If you Undo something and then change your mind, this handy menu item will Redo that action. (In other words, Redo is a way to undo an accidental Undo.)

Remove the currently selected text, attachments, or rows from the outline and put it on Mac OS X's Clipboard.

Put a copy of the currently selected text, attachments, or rows on Mac OS X's Clipboard without removing it from the outline.

Insert a copy of the clipboard's current contents into the outline. It is inserted at the text cursor or, if a row is selected, after the selected row. Note that when you are in text-editing mode, the lines get pasted into the row. When you are outside of text-editing mode, the lines get pasted as individual rows.

There's only one real problem with Paste, and that has to do with styles. If your clipboard content is Rich Text, it has style information attached to it. Suppose you want the text, but not the style information. If you use Paste, you will have to remove all the style info that the text brought with it, which could be a bit annoying. That's where Paste With Current Style can help you out. Using this variant of Paste, the style information gets left behind, and the pasted text adopts whatever styles are applied in the location where it is pasted.

Delete gets rid of selected text without putting it on the clipboard. Use this when the stuff you want to dispose of has no redeeming value and you have no intention of using it elsewhere.

Use this command if you want to select everything in the context of what you currently have selected: all the text in a row, all the rows in an outline, or all the styles in the styles palette.

No tricks here. This command simply deselects whatever stuff is currently selected.

Use this command to duplicate a selected action and its children, if any.

This sub-menu controls the status checkboxes on your outline. Use it to set whether there is a checkbox on the current row, and whether that box is checked.

Checked and Unchecked act as you would expect.

None removes the status checkboxes from the selected rows entirely; rows with no status checkboxes are ignored when calculating the values of their parents' status checkboxes.

Calculated is for when you want to put a status checkbox on a parent row, and you want its value to reflect the values of its children like a good checkbox should.

This menu command moves your cursor from the row you are working on to the note attached to that row. If you are in a note when you invoke the command, it moves you from the note back to the row proper.

Use this command to attach an external file to your document. It gives you a navigation dialog to find the file you'd like to attach. The attached file will be anchored at the location of your cursor.

If you want to create an audio recording, use this command. A live recording image will appear where your cursor was.

Once you click on this command, it changes Stop Recording, which you should click when you are done recording your audio clip. The live recording tag will change to an audio clip attachment.

Use this sub-menu to insert a time stamp into your document. The choices on the menu let you choose which kind of stamp you get. The stamps appear in formats based on your date and time format settings in Mac OS X's System Preferences.

Show Batch Find opens the utility drawer and moves the cursor to the batch find field there.

Find... opens the Find dialog, where you can set detailed parameters for your search, and to do things such as replacing found text with other text. Usually you'll want to search for a string, but if you are familiar with regular expressions you can choose to use them as well. When searching for a string, you can choose to pay attention to letter case and whether the string is a complete word rather than just part of a word.

Find Next, steps forward in the document and locates the next occurrence of the last thing you searched for.

Find Previous is like Find Next except it steps backwards through the outline.

Use Selection for Find command lets you quickly take your current selection and turn it into the search string. Then you can use Find Next and Find Previous to locate other instances of the text.

OmniOutliner provides you with the familiar OS X Spelling utilities, which work exactly as you expect them to. For more information about how OS X spelling utilities work, check Mac Help.

OmniOutliner makes use of Mac OS X text-to-speech facilities, that make written content available in an audio format.

Start Speaking causes the voice synthesizer to start reading the current selection.

Stop Speaking causes the voice synthesizer to stop reading. This choice is only live while the application is trying to read the text out loud.

This menu choice opens Mac OS X's Character Palette.