The Search Admin Tool is where you can search through some of the other admin tools and find the part of the site you want to change.
To use this tool you must have the perm admin_search, and you may only search those admin tools which you have permission to edit.
The search form allows you to choose which admin tools to search in, as well as whether you want to search for a phrase, all of the search terms in any order, or any of the search terms.
Search results are displayed grouped by the admin tool they were found in and show the item name, description, and provide a link to the edit form for that item.
Generally if you are searching for a specific part of the display (not including usernames and other very dynamic content) you will want to search in the `values' (Block values, Box code, or Special Pages); if you are searching for items that do a task that you can describe but do not know what specific output it creates, you will want to search in the `descriptions' (Block descriptions, Box descriptions, or Site Controls descriptions).