Searching for actions or projects
The OmniFocus toolbar includes a Search field for filtering the main outline down to items that contain a certain string of text. As you type in it, items that don’t match disappear dynamically. You can search based on action names, notes, context names, or project names.When you’re done, click the clear button on the right side of the field and everything reappears.
OmniFocus also has a Find and Replace panel like many other applications; from the Edit menu, choose Find ▸ Find to summon it. You can find and replace text in the visible columns of any items that are visible in the main outline. Even dates and assigned contexts can be replaced, though the context you’re replacing with has to match the name of an existing context.