Syntax10.Scn.Fnt XE.Open SortDemo.Mod XE.SysOpen SortDemo.Tool After opening the editor XE, you can compile the source by clicking with the middle mouse button on XE.Comp in the menu. "XE.Err" in the menu of XE shows you the next error (if any). After successful compilation open SortDemo.Tool and start the program by clicking on SortDemo.Open. Move the mouse over the just opened window and mark it by pressing the F1 key. This marked window will be used by all commands having a * as parameter, like e.g. SortDemo.Heap.