HBR of g-m modes for KIC 9882316, for which only the central m = 0 rotational component is visible. Observed modes with m = 0 are in light blue (characterised by the right ordinate axis). Missing modes with m = ±1 are in red (characterised by the left ordinate axis), and their HBR follows a Gaussian envelope (in black) referred to as x in the core text, which is normalised to the value of 8. Vertical dashed lines identify frequencies of observed m = 0 modes. The number of missing m = ±1 modes has been chosen to be the same as visible m = 0 modes.