Increase animation speed
Once you've enabled developer settings, it's time to speed up those animations.
Go to the Settings.
Scroll down and select System.
You should now find Developer options near the bottom of the list.
Scroll down until you reach the Drawing section.
Here you'll find three different Animation scale settings, which will all be set to 1x by default:
Window animation scale
Transition animation scale
Animator duration scale
Change each one to .5x in order to bump up the animation speed. (Smaller numbers are faster, larger numbers are slower. You can also turn off animations altogether, but that's not advisable as things look very strange without them.)
an oldie but a goodie
while you are in developer settings you can also set how many devices can connect to your bluetooth
default is usually set to 3 devices
you can change that to 1 or 2 depending on your needs
in dev settings look for "maximum connected bluetooth audio devices"