title: Is fast (repeated) undo possible in emacs?
body: <p>I use emacs and I have a problem with it's undo.</p>
  
  <p>(Sorry, maybe this is a stupid question, but I did not find anything about it in the internet, whilst it should be a basic functionality of any editor).</p>
  
  <p>To invoke each undo step I need to press 'Ctrl-x' and then 'u'.
  But if I have done 200 steps and I wish to undo them, my hand and fingers get horrible pain from repeating 'Ctrl-x' and then 'u' 200 times, to say nothing that this operation takes about 5 minutes.</p>
  
  <p>In Microsoft Word, for example (and also in many other editors) undo is Ctlr-Z, but you can press and hold Ctlr-Z and multiple undo steps run fast. Is this achievable in emacs?</p>