Response in the Forum
Paul
Bingo! The final line in you last post revealed what was needed.
Previously, I had commented out the whole WINIO@ line containing %gr. With hindsight, this was completely stupid, but it is the sort of error that can happen when reviewing software that has not been touched for about 15 years. I use FTN95 extensively in software that uses GraphTun to display output, but the only other uses of ClearWin routines in all that time were (i) converting from FTN77 and (ii) revising colours when the default in Salflibc.dll was changed to reflect modern usage.
Anyway, I truly apologise for failing to follow your original METAFILE_RESIZE guidance correctly and I thank you again for your help and patience.
Alan