The picklist control allows the control to be set up with predefined values to be sent to the remote device. This restricts to sending only values defined in the picklist. Furthermore labels can be given to picklist values making the selection user friendly.

This is first done by selecting Picklist from your control type:

Then enter the values to pick from separated by comma's:

Then when sending a control you will have those values to select from:

To enter labels for the values separate the label from the value with a pipe character | then use a comma to separate the values as shown:

This will display as shown:

When selecting the actual value will be displayed in the Send Value and will be Read Only:

The PickList also supports sending direct Boolean values: