In mods which include hunter-killers (or otherwise very fast enemy UFOs), you need to keep dogfight speed in the options rather low, so that you have time to react if someone attacks you quickly, even out of the blue so you don't have time to go to the options screen. But if it ends up being a usually boring encounter, you'd like a quick way to speed it up.
What I'd really like are some hotkeys in the dogfight screen to speed up (or I suppose slow down) the dogfight.
I propose using 1,2,3,4,5,6 similar to geoscape speed setting where 1 would be the slowest and 6 the fastest speed. This way the players would not really need to learn and remember any new hotkeys that they would not already be using in geoscape. This change would only apply to the specific dogfight where the key is pressed, not the dogfight speed setting in the options.