Double-click on the filename to open an Editor tool showing that file and show the first match in that file. Similarly, double-click on the line number to show that line in the Editor. Items that have been edited are shown with a different icon. You can change an item to show as edited or not edited using the Mark Edited and Mark Not Edited commands on the context menu.
The Editor command
Next Search Match
can be used to move to the next item in the last Search Files tool that you used.