If you don't know the number or position of the line you want to make your current working line, you can locate a string (or regular expression) in the line. To search forward for one or more words or a string of characters, enter:

/regexp/

where regexp is one or more words or a string of characters. The line containing the search string is displayed and it is now your current working line.

To search backward for one or more words or a string of characters, enter:

?regexp?

where regexp is one or more words or a string of characters. The line containing the search string is displayed and it is now your current working line.