RailwayRouteOptimization/scripts/Modify/Rotate2/doc/Rotate2_proc_en.html

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<ol>
  <li>Select the entities you want to rotate and counter-rotate.</li>
  <li>Launch this tool.</li>
  <li>Set the center for the main rotation with the mouse or enter a coordinate
  in the command line.</li>
  <li>Set the center of the rotation for the individual objects. This second
  center of rotation is rotated together with the entities around the first
  center.</li>
  <li>The rotate two dialog is displayed where you can enter the rotation angle
  and counter-rotation angle.
  <br />To delete the original entities, check "Delete Original", to copy them
  choose "Keep Original". You can also create any given number of copies by
  choosing "Multiple Copies". 
  <br />The new entities are placed on the same layer as the originals and
  have the same attributes. To use the current layer and current attributes
  instead, tick "Use current layer and attributes".
  </li>
  <li>Click "OK" to rotate the entities.</li>
</ol>
<br />
<img src="Rotate2Figure.png" class="figure" />
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