title: Vim Ultisnips - How do I move to the next placeholder or tabstop?
body: <p>I just installed a brand new copy of Macvim and <a href="https://gitcafe.com/doun/utilsnips" rel="noreferrer">UltiSnips</a>, but I can't figure out how to move to the next completions using tabstops and placeholders.</p>
  
  <p>When I press tab, it simply adds a tab space. </p>
  
  <p>My guess is that the tab key was remapped in another plugin or vimrc, so I went with fresh installs and an empty ~/.vim folder.  Still nothing...</p>
  
  <p>How do I move to the next tabstop?  Is there a key mapping I can set?</p>