HDL Prism Pro User Manual page 19

combination mode supports mutual exclusive function).
⑤ Double key: to select whether continuous two buttons are combined as a button to use,
the objects of combined button are those of smaller button. For example, after combining
button 1 with button 2, the objects of combined button are those of button 1.
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Prism Pro/Multi-function Touch Panel User Manual
Figure 3-2 Button status setting
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