Show Unused variables
 Shows local variables not accessed
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 This option will place an [unused] label against each local variable
 within the variables window that have not been assigned.

 If a variable simply declared as LOCAL nCounter with no assign statement,
 it will appear in the Variable window as NCOUNTER <Local, U> : NIL [unused].

 If the variables is assigned, then the [unused] label will disappear.

 This can help you to find local variables within a function or procedure
 that are not used.