Details on Selecting a System Element
Information on the Select system element dialog.
Lists the systems for preselection and allows a system to be selected.
 The dialog can be opened by double-clicking in the corresponding field of the System or System Pipe run/Manifold-(port) column, with the 
 button in the field itself or with F8 when the line is marked. 
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 System preselection The button opens the System preselection dialog, where you can add further systems, edit the systems for preselection and remove systems from preselection.