Suppose you are searching for a Title Case pattern in a large text file and you want to edit a incorrect regular expression:

1. First, go into Ex mode by typing q:
2. You will now see all the commands that you typed in commandline mode, press j to go the regular expression you want to edit (/\v[A-Z]\w+\s[A-Z]\w+)
3. Once done, press ESC to go to normal mode
4. Then press Enter to run the search patten

Here is a screen shot demonstrating a Title Case search