Hey guys,
I'm pretty new on this ckeditor and I have to create an editor so that can only be possible to edit numbers and some special characters like (+ - / ). That's because I'm creating some kind of math formula editor and cannot allow letters.
I noticed that is possible to disallow contents but i'm not able to find any solution to my specific case.
Is that possible to avoid letters and only allow numbers to be inserted?
Thanks in advance!
Daniel