I just tried MANNO, here are some of the problems I had with it.
DOSLib error: integer argument expected.
Please pick an entity [Valid Type: MTEXT/TEXT/ATTRIB/ATTDEF] <Exit>:
when selecting text such as "12this is text" MANNO does nothing. When selecting text such as "this is text 23" MANNO does nothing. When selecting text such as "12 23 44" MANNO correctly changes the "12" but erases the " 23 44". And why blipmode?
PS. I'm not trying to "bad mouth" this software, just an observation.