Document inspector

This inspector affects your outline document as a whole, rather than some particular part within it.
Display
Select the Alternate Rows checkbox to give every other row of the outline a background of the color shown in the color well. Click the color well to bring up the color panel, which you can use to set a new background color.
Select the Horizontal Grid checkbox to put thin lines between each row of the outline. Click the color well to show the color panel, which you can use to set a new color.
Select the Vertical Grid checkbox to put thin lines between each column of the outline. Click the color well to show the color panel, which you can use to set a new color.
Under Show Title, you can decide what to do about the outline title and section titles: select Always to show the document title at the top of the outline, and also to show the section title there whenever you hoist a section; select When Hoisted to show section titles there but not the outline title; in OmniOutliner Pro, select Only For Editing to show the titles only when you double-click them in the sections list to edit them.
The Show status checkboxes checkbox determines whether the status checkboxes for each item are displayed. The status checkboxes retain their values while hidden.
Select the Show attachment tags checkbox to display attached files as tags; otherwise they will be displayed inline.
If the Inline notes span document width checkbox is selected, then when you view notes inline, they will be allowed to extend past the topic column; otherwise they will be restricted to the topic column.
Spotlight
If you are using Mac OS X 10.4 Tiger or later, you can add lots of delicious metadata to your outline. This information applies to the whole outline, and appears as part of the outline in Spotlight searches.
Type whatever you like in the Copyright, Version, Subject, Description, and Comments fields.
Use the pop-up menu to select from the available lists of tags that apply to your outline. Click the plus button to add a tag, or select a tag and click the minus button to delete it. You can add Authors, Organizations, Languages, Keywords, and Projects tags to describe your outline.
Advanced
You might find yourself using different commands when working with different documents. Select the Document-specific toolbar checkbox to set up the toolbar especially for the current document. Your other documents will continue to use the standard toolbar however you have customized it.
Normally OmniOutliner 3 documents are XML-based text files. If the Compress on disk checkbox is selected, the file will instead be saved in a binary format that takes up less space on the disk, but that can't be read with text editor programs.