There is a missing parm value in OSDx_TXT_RES. Here’s an instruction from MP ’ Now you can select to display either the SD or HD fonts using OSDx_TXT_RES for each OSD screen enabled. 0 = SD (30x16), 1 = HD (50x18), 3 = HD (60x22).’ Only parm 0 and 1 are listed. Can someone verify why parm value 3 is missing in the latest Ardupilot release.