I am not sure if your using the desktop keyboard. If your not, you can access the desktop keyboard at the bottom right corner of your desktop which look like a small keyboard icon. This will allow to use icons /emojis when typing. I will have to look up the name of this in case you don’t have the icon. I will have to give this a try thanks for the tip.
I don’ see a way where you can create a text item that has separate Text Styles in the same Text String so you would have to label your Arrows and then your Slopes - however I am sure that we could write a TML for labeling that did this with two Text Items - However I think I would want to create an Arrow shape / lines and the text and snap it in using either TIN Slope and Direction (single point click) or a 2 point selection (interpret slope from Point 1 to point 2) or (input the slope from point 1 to point 2) or input slope and direction at a single point etc.
This tip even helped on another program. HCSS. Adding dimensions and not having good enough arrows. I decided to use the desktop keyboard to key in arrows. works so much better then the internal arrows. I had to add the wingwall drill shafts and dimensions.