For applied tech Press Space! The FPS (lag level) variable tells you how many FPS Scratch requires to update the movements of all the clones. Beware, the lag gets stronger every 10 or so seconds. Scratch will start delagging after 27 seconds, so don’t expect to get higher after awhile unless you installed Scratch extensions or have a powerful computer.
I improved the FPS method by adding a formula that calculates how many frames per second Scratch would require to make the project look smooth.