Animator: Change animation at any time

Hi!

I have a basic player with a few animations and masks and I have noticed whenever the animator should change animation is takes a while for it to do so. I've noticed that it plays the whole animation and then changes animation. So if I had a long idle clip on like 10 seconds it would finish it and then play the run animation. How can I make so it changes in an instant but still with some transition so it isn't like a stepped animation?

Thanks in advance!