This bug report was originally posted on the Firestorm Jira on the 29th of June (2024), I paste it in here too because it is apparently something that was removed along with SL Viewer code changes. Except for a note on FS-specific UI at the end that I've edited to adapt for the SL viewer interface, I've kept the original text.
I don't know with which version they went away, I only noticed now on a fresh reinstall of my computers that I can no longer set the debug settings AvatarRotateThresholdFast and AvatarRotateThresholdSlow to get the effect of more finely rotating my avi in order to for example fix up a non-sit-on-object based hug animation with my partner. The ...Slow is seemingly not having any effect at all, and the ...Fast is no longer showing up among the debug settings. In the SL viewer I've never used them, don't know if they ever existed, but I do find them at https://wiki.secondlife.com/wiki/Debug_Settings#:~:text=AvatarRotateThresholdFast with the Slow option right below it. I only know that I used to have that in FS, and I would very much like these things back, or better yet of course, settings in Preferences for it. I file this as a bug rather than as a feature request, because we used to have this setting and so I consider it "broken" now.
The problem: you use a HUD to initiate a hug with another, they accept and you're both animated, but you end up with your arm sticking out the back of the other. You wish to rotate just slightly, by hitting A or D (or arrow keys) by just taps, your avatar doesn't rotate, only the cam does, you hit again, and again, and then eventually you turn but you overshoot.
Solution: you decrease the threshold for turning, and so the avatar will react right away, and turn the minimum degrees as you carefully tap a turning key.
Maybe could this be something for Preferences or better yet something easier to access and change as needed, like with hover height where you can use a slider (or for more precision, enter a number, like with the hover height) to set the turning threshold / sensitivity, and another slider for the minimum amount of degrees of turning. But I would be happy to get the debug settings back and working....
Thank you so much!