Chainstitching, using a topstitch needle and two needle threads for a thicker front/rightside of a chainstitch.
Replaced the serger needle in my machine with a topstitch size 14 needle.
Then thread my machine with two spools of gutermann thread.
Do the chainstitch as you normally do, and you end up with a thicker looking stitch on the front/rightside of garment.
Some advice, never yank or hard tug your fabric after you chainstich or serge, I know several if not most instructional videos they do that. There is no reason for that, and it is a good way to bend any of the mechanisms on or under the needle plate. Not to mention may bend a needle also.
Owning both the serger Singer Finishing Touch™ 14SH654, serger/coverstich combo Singer Professional 5 14T968DC, I am going to try to become super proficient and skilled with these two machines. I want to be the goto person for using both of them.