RailwayRouteOptimization/scripts/Select/SelectContour/doc/SelectContour_proc_ru.html

<ol xml:space="preserve">
  
<li>Choose the 
  
<a href="../../doc/Select_en.html#mode">selection mode</a> in the options tool
  bar.</li>
  
<li>Use the mouse to pick one entity of the contour you want to select. The
  tool then searches from the endpoints of the selected entity in both
  directions for entities that are connected to this entity. All connected
  entities match and are selected or deselected depending on the selection
  mode.</li>
</ol>