Thank you Antechinus
I will proceed with the counsel of everyone in mind.
Thank you again to all.
Will give it a go and report results here.
Used NotePad+ to open Forum>Themes>(your default theme name here) index.css, then IMMEDIATELY saved a copy as index-original.css (used if something goes wrong) then searched for "font-size".
There are 74 lines with font-size and only one or two are classified as pt every other one is (per Kindred) using em.IMPORTANT:
Following almost every reference to em, there is/are either margins, padding, or line-height.
I chose to believe that changing the font size, change presentation, i.e., if I change the font-size from 0.5 em to 1.5 em there will probably be a significant change in the appearance of the area that is changed.
I also believe that, as almost every font-size reference is followed by either margins, padding, or line-height, if you modify the font-size, it would be prudent to modify the attribute that follows it proportionately.
This is adding .5 to each attribute and is not proportionate
This is a result of multiplying font-size of 1em times 150%, and then multiplying the line-height times 150% and this is proportionate
Imagine doing this for 74 lines of coding.Summary:
Unless it is broken, don't fix it?
This shows the hard work and balance that the programmers are providing. Thank you for your work to make SMF what it is.
PS - I will leave the forum as is.