The measure number range (e.g. [24-34]) below a multi-measure rest can be very helpful for the player.
But it should not include unnecessary information either. So it makes sense to not show it on every multi-measure rest, but only on the longer ones and for example after each double bar line (Option: "
Show Measure Rang After Double Bar Lines").
The number of empty bars for hiding/showing measure ranges can be set twice:
a.)
Absolute: "
Always Hide Measure Range If Less Than X MMRest Bars". By default it's set to 3.
b.)
Relative: "
Hide Measure Range If Less than X Adjacent MMRest bars" also takes into account measures before and after this multi-measure rest. By default this is set to 10.
For example two multi-measure rests of 3 and 8 measures each will show the range (3+8=11), but a single 8 measure MMRest will not show the range (see image 1).
The measure range can be activated by selecting "
Show Measure Number Range on MM Rests", but it currently can't be hidden if it is already visible.

Image 1: Adaptive Measure Range Visibility on Multi-Measure Rests:
Visible if at least 10 adjacent measures and after double bar lines.