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How to enquire node numbers, values at nodes and more

A very common problem is how to get the exact value on a node position during post-processing. To actually get the value add the element edges to the view (see Toggle Element Edges) and type qenq and press the RETURN key (during typing the mouse-pointer MUST stay in the main window, do NOT move the pointer into the xterm). Then move the mouse-pointer over the location of a node and press the ``n'' key. The node-number, the value at that node and the location will be written in the xterm from which the cgx was started.