>Say for example I'd like to indent the text between lines 10-20. I'd

>like to use marks points to indicate the lines through which to

>repeat the last action I performed on a single line (in this case an

>indentation), how would I do that?



>I know I could for example do some regex like this:

>:'a,'bs/^/ /

>and clearly I can do this with a visual selection.

>but how could I repeat the last action I performed over two marks:

>:'a,'b<something goes here to indicate 'repeat last action'>



'&' is a good start.



Eg, if I use a 's///' command on one line just to see if it works as

expected, I can repeat it through the entire file with



:g//&

:.,$&

:15,20&



etc., and it'll redo the 's///' command on the rest of the file or

whatever limits you impose.



If you do a non-'s///' command, eg, ":10,30>" to indent lines instead,

you can look for patterns, etc., and do things like



:/beginpattern/,/endpattern/>



too.



Not quite sure if that's what you were asking about, but if not, just

yell back...