Start or stop recording. When recording is in progress, the icon turns green. During recording, a JPG file is saved next to the PSD in a separate folder after every change to the document.
Opens the settings where you can adjust the quality of the JPGs and set the desired interval.
If you'd rather save the current state with a single click, use the Tiny Tool "Snapshot." Here, you can save JPGs, PNGs, and PSDs at the touch of a button.