Search code is searched using the Find commands in the ribbon:
These Find commands are only available for use with the Source tab.
You can find the string you wish to locate by entering it in the Find entry field in the toolbar and pressing Enter.
You can open the Find dialog, which is similar to the standard Windows text Find dialog, by:
You can browse backwards or forwards through your search results using the forward and back buttons.
To use the Replace facility:
For further information, refer to the Source tab's Find and Replace.