@dalehileman,
I recall a way to do it, but a routine written 17 years ago by a programmer with an IQ of about 0.03
Highlight letter or character
Switch from "Plain Test" to "Rich"
Access "Edit" "Special characters"
….whereupon you will be presented with a selection of 4,351 versions of the character you had highlighted (eg, "Ĥ") . It might require some 15 minutes of concerted scrolling but eventually you'll find the crossout. Highlight it
From this point on the procedure is uncertain. Programming authorities have been working on this perplexing step now for several years with only limited success
…...Furthermore you get only one chance: Once you've selected the "h", "Special Characters" is disabled; though they're working on this problem. One programmer has suggested that to prevent its disappearance you must click on the highlighted character a second time but with your left hand, holding your left foot with your right hand
One of the other reasons for all the complexity is that the typical programmer thinks the more difficult to access a routine the more you'll appreciate his work