title: ImageJ overlay get removed when rotating
body: <p>I'm learning ImageJ now but I got a problem.</p>
  
  <p>First, I added an overlay to an image (using Image-Overlay-AddImage in menu). Now I want to rotate the image and keep the upper overlay remained as a reference. But when I use the rotate command(Image-Transform-rotate), the overlay is removed.</p>
  
  <p>However, this operation is fine with rotating 90 degrees(Image-Transform-Rotate 90 degrees left/gight) and the translate command(Image-Transform-translate). These are just what I want, keeping the overlay remained and make the origin image change.</p>
  
  <p>I'm wondering why these are different, especially the 'rotate' and the 'rotate 90 degrees', and how to rotate correctly with out removing the overlay. Anybody can help me? Thanks!</p>