I have perfected mine over the years.  My first step is to copy my prior year's Standard Letter to the first blank line over the current 'Standard letter"   I do that for all modules (1040,1065, 1120.etc).  the codes almost 100% of the time are same year to year. I leave 'both' letters as the Standard Letter, for a few returns to make sure the carryover is right, Then, I just deleted the lines with the ProSeries current year standard letter info, and bingo, my perfected letter is the Standard Letter.  I have some things in BOLD, some with paragraphs outlined, some with paragraphs shaded, some in Italics, etc.  I'm able to print a page with just dates and amounts for estimates that we staple the 1040ES/s to for our clients The standard letter has every option on it, but the first thing we do when starting each client's letter, is create a client specific letter by saving the standard as such. Then we can copy some specific paragraphs etc. from Word and insert.  delete blank lines, add blank lines, etc. so that we don't have half a paragraph on one page and the rest on a separate page. Our first step in Review is to review the CSL. I can't tell you how many times the CSL has saved my butt.

I'd be happy to share.  I guarantee, you would love it.