FPS Slider in game

Hello!

I am working on a game and I would like to include some form of FPS slider in it.

I am trying to use the sys.set_update_frequency( value ), which does work. However, it results in the character shaking if it is not the same number as the “Fixed Update Frequency” setting. Is there a way to either update the “Fixed Update Frequency” setting during runtime or should I go about implementing an FPS slider in a different way?

Thank you!