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# LogiView

## How to Display Unused Variables

| ### What to do:
| As a prerequisite for this example, you should have followed the previous examples, i.e. you must have created either the DocuDT decision table or the DOCU_FLOAT_1 variable.
| Open the Logic Models/Procedures form from the Manager > Macro > LogiView > Logic models menu or click the button .
| Switch to Query mode and search for the decision table DocuDT
| Click the button Syntax Check.
| When calling this function for the first time after creating or updating a decision table / procedure, a mask is displayed reminding you that the decision table / procedure has been modified. Once you have confirmed this message, the list is generated or updated. This may take several minutes since all available decision tables and procedures have to be checked.
| The message contains all variables that are assigned to but not used by the DocuDT decision table.