How to use Text Mask command in AutoCAD 2018

can attribute text use mask? if can, then how?

HI Mr. Scahidanad..just a quick question concerning how to make multiple colors in one continuous text? for example, Letter A-is blue B-is Red C-green is this possible? cause normally you have to do the individual coloring of the text through Text Style color, height, width, indent or not, and text style. So how to use different colors in one continuous text. Hope you can help me, cause doing it one by one taking much longer time to complete it. Thank you in advance.