Optimize Excel Code - Too many FOR NEXT Loops

Amazing code, jindon. Thank you so much. Incorporated with slight tweaks to formatting (some color changes0. Is there a way to also turn red the font in columns AM to BW? You know, the ones that are counterparts to the ones turned red in columns A to AK. Its nice to be able to scroll right and quickly locate what the values were before edits.

Presently, all the Summarize button does is to copy the Main worksheet over to the Summary worksheet. What I need it to do is only show rows that have something red in it and the column header for that. Earlier I successfully did this with an insane amount of For Next loops. I have since deleted that because it is too slow and this was the reason for this post. Do you know how to accomplish this for rows 3 to lastrow on the Summary worksheet? Since there are so many rows on the Main worksheet, its a lot to scroll through to find the red ones that changed. That is why I want to show only the rows with some red and their headers on the Summary worksheet. Hope this makes sense. Latest workbook attached. Module password is the same - dmu123xls.

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