Tip on how to mark in a list box

At least one indication in every list box has to be made to show a result for each variable. When you wish to see one or a few variables, mark these only. N.B. To undo a mark, press the button CTRL and click the mouse button on the text.

To select all lines in a list box To select/undo a marked line in a list box To select more than one line in a list box To search for a specific value in the list box