The search function can be accessed via the tab in My Assitant or from the button at the top of the board index. When you click this tab or button you will see:
Search works just like searching on Google or Yahoo or any other search engine. That means you can use "" or + and other search filters to help your search. Use the tools correctly and Searchy the Search Servo can be your friend. Use them incorrectly and you will be lost to chaos!
Using this will do a simple search within the forum you are in unless you uncheck the Search this forum only option.
However if you choose More Search Options you will be taken to this screen:
Here you can do a more indepth Full Text Search. You can also select multiple forums by control-clicking the forum name. Once you've put in your search parameters simply hit the search button.
Clicking Advanced Usage Options on this screen will give you the following help page:
Alternatively you can select More Options to go to the following screen:
Here you can continue to refine your search parameters and display results options.