Up until F26 increasing the space between a pair of composite time signatures from which the plus sign had been removed (for instance, to place parentheses around the second one) was a reasonably straightforward affair. However, in F27, when you get to the point of increasing the font size between the signatures in Document Options>Fonts>Notation>Time Signature Plus Sign>Set Font nothing at all happens regardless of what font size you try.
MM confirmed this problem but have no solution and suggested I post here. Has anybody else noticed this?
M1 iMac Big Sur 11.5