Quote:

If I enter the three notes manually in editable notation view, all is properly displayed (as expected). BUT, if I delete the first note of the triplet, creating a rest, the problem of my original post exists. Note, the rest does show up in the editable notation view but all other displays show two non-triplet 8ths.

Iff 'Tick Offset' is different from zero.

Note, the Tick Offset settings in the Notation Options do affect the notation. Often these settings are around -7, say. When reset to 0 the triplet rest does show up even when not entered explicitly. Setting Tick Offset to -7 again makes this rest vanish - 'Clean' assumed to be unchecked throughout.

Explicitly entering a rest seems to help in this quest.

Martin