It works but I believe it should also have this function documented in the Readme.

Sorry, I'm not particularly techie...

How do I actually implement this rotation in a sketch?

Thanks

I was just looking for a way to do this for those cheap 4 display modules.

Thank you for this! Worked like a charm

Is it possible to add simple display text without any scrolling?
Now to display text you have to setTEST, choice scroll and commit, 3 functions..
can it be easy to add new one to send text with position on matrix?

Perfect. Thanks. Works as expected.
So (when) will it be merged, @squix78? 😃

This NEEDS to be merged! :D It's amazing and works! 90deg rotation FTW!

It didn't work for my 4-display module. I had to change one line in targetblank code in the RotateLeft function (in CCP file).
Then worked perfectly!

bitWrite(rotatedCols[8 * (deviceNum) + posY], posX, bitRead(cols[8 * (deviceNum) + posX], 7-posY));

For my display I need a RotateRight method , to fix the display on 2 matrixes
Can someone help me please?

Worked for me like a charm. Wondering why it is not merged.