Hiding text is something you want to be able to do quickly in many cases so I think this would be useful. There aren’t any two letter aliases you could use for /hidetext or /hidelines as far as I know (/helpticket and /highlight are /ht and /hl respectively) but adding something like /htext for /hidetext and /hlines for /hidelines along with both /ct and /ctext for /cleartext would be nice.