You can't have replace change the output from a formula... the output is the output. Just think if you could use Edit/Replace to do that... the next time the worksheet was recalculated, the replaced letter would just pop back in... that's what the formula outputs after all... and since the Replace operation is a manual "thing", it would not re-occur until you manually performed it again... I think you would get real tired trying to keep up with all the recalculations that take place in Excel. The way to handle this is to make the replacement take place as part of the formula...Yeah and that would work fine, except the find and replace tool is the problem for me; if all I wanted to do was find the o's in cell values then that would be simple but in the replace tab the only option for Look in: is "Formulas", so I'm still not sure how to do it. Sorry to be a pain
=SUBSTITUTE([YourFormulaGoesHere]<YOURFORMULAGOESHERE><YOURFORMULAGOESHERE><YOURFORMULAGOESHERE>,"o","X")