Link Visibility of Label Controls
The output field is a label control that has a reference to the data schema element.
The field label is a label control without a reference to the data schema. You specified the text to be displayed in the caption property.
To suppress the field label when the data schema element is empty, you link the visibility of both label controls.

In addition, the label control property empty allows you to specify if the system is to display a blank space in the place of the label control.
You link the visibility of two label controls as follows:
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1. Right-click on the field label, and choose Link Visibility.
This label control must not have a reference to the data schema.
The mouse pointer takes on the shape of a hand.
2. Left-click on the output field.
This label control must have a reference to the data schema.
The linked label control is highlighted in color.
You can remove the visibility link using the right mouse button.