In contrast to Fixx, I/we probably did 100 manuals and other long documents (or more) in v8. I would have to fix an older computer and hook up an old SCSI controller, hook up the syquest drive to take a look at my syquest disks where all those old publications reside on to find out. chp files in v10, so that isn't an indication of.
However, one can still build publications using. chp, etc., files.at least according to the Open dialog. But I don't think I ever tried when using v10. I'm pretty certain v5 did open v4.2 and older files, and almost sure V8 did.
CorelDRAW or any other software than Corel Ventura? I suppose Corel never released Mac versions of Ventura? At least the first true Corel versions must have supported the old CHP format.
Does this version still open old (DOS/GEM/Windows 16-bit/Mac 3.0/3.2) .CHP files? Corel Ventura 4.2 which I think was basically still by 'Ventura Software' (Xerox) and just labelled 'Corel Ventura' can, but I never upgraded to actual Corel versions.