Facer will not do that. But a brilliant Idea. I wonder which Language uses that. I struggle with Basic so that looks very advanced to me.
Looking at what you have published recently you have Obviously cracked it. The only way it could be done on Facer without Drawing anything. So we’ll done and Respect for leaving the Design open for inspection.
Every full language has a plethora of string parsing functions that all work pretty much the same way. I did find another post saying there were none in facer so I just used 3 shrt day name elements offset and 2 black masks to cover the un-needed characters:
Its good workaround, but unfortunately it has one flaw.
The inconsistent way the abbreviations are localized. In some languages. While in English is it 3 letters, in some other languages it is 2 in another 2 and dot, on some other 3 and dot, some have 4 letters and in some the short version equals the full one.
Bum. And I can’t think of a workable solution without dozens of masks for the various languages as well as possibly even more date fields as the position could only be set with up to 3 nested conditions I believe.
I really was surprised to find not a single string function in all of the expressions.
I think your only option now is my suggestion of 7 week day pictures with the writing vertical and use opacity expressions to show each one on the proper day. Of course that will limit the face to only English week day names, but you really don’t have any other options.
You could also place 2, 3 or what ever text field lines, each with expression for the letter you like (just replace the right letters for your text). Something like this $#DOW#=1?M:$$#DOW#=2?T:$$#DOW#=3?W:$$#DOW#=4?T:$$#DOW#=5?F:$$#DOW#=6?S:$$#DOW#=0?S:$
I have seen it here