title: How can I open a help file in Vim on a new buffer in an existing window?
body: <p>I often take a look at help files in Vim, but sometimes I want to read one in full screen. Since the :help command opens it in a new window, and closing the old window, if it was the only one besides of the help file, for some reason closes Vim, the only way I found of doing this was opening the help file, and then reopening it in a new tab.</p>
  
  <p>I wondered, is there any way to make the :help command (or another command) to open a help file in the same window, but a new buffer?</p>