In absence of any direction on formatting on opting for 'editing' his earlier version, how can a mere writer without programming knowledge reformat an article already submit

This is in continuation of 'Boddunan's kind response to my earlier query on whether resubmission of my own article due to lack of knowledge on the specific programming language to adopt for simply highlighting certain parts of an earlier version of my own artilce in 'bold' characters, can be treated as 'copied' content. Unfortunately, the 'edit' option does not give any simple option for such highlighting, other than asuming that the formats shown for already highlighted parts should be adopted, I did that, but appear to have failed. So be it! Thanks for the response. I am now trying to simply undo the reformatting language of my earlier version to try my luck.