How to undo all in Photoshop quickly

Question

What is the quickest method to undo all changes back to the source of the history?

Version: 2022

Answer 1

If you're talking about reverting to the previous save then just use

function revert_it()
{
  var idRvrt = charIDToTypeID( "Rvrt" );
  executeAction( idRvrt, undefined, DialogModes.NO );
}

You can also get the number of history states from the current document

var history = app.activeDocument.historyStates.length;

You can add revert to a shortcut menu: