Capt & FO Oxygen Mask test

[chasbruce]

I can't find in the offset list the button and light when you do the captain side or FO side test of the oxygen mask

Pls can you point me in the right direction

Thx

[John Dowson]

Only a limited number of simvars are added to FSUIPC offsets, and oxygen mask test certainly won't be one of them - there doesn't even exist as a simvar for this as far as I am aware,
What aircraft are you using? First look to see if there is a preset available for this, and if so you can use that. If its a PMDG aircraft (or one that has custom controls), then also look at the aircrafts SDK to see if anything is available. If you let me know what aircraft you are using I could maybe advise further.

John