RIEVTECH STUDIO SOFTWARE MANUAL l Word register control the pop-up window For the option “ Popup Window ID ” , aword register needs to be given to specify the ID number of the popup window. For example, add a word control window component and a numeric value input component in your project. The word register controlling the pop-up window is set LW0 and it is also connected with the numeric value input component. It is shown as below. 285