When an option is selected from the combo box, I want one label on the form to be hidden. Hiding Labels in InfoPath Designer.
You want to add a conditional formatting rule to the field that you want to hide.
The condition should be something like "ComboBox | Contains | Value" and then hide this control.
I've created a combo box called field 2 with values Value1 and Value2. I also created a simple text field called field3.
Now I want to hide field 3 when "ComboBox | Contains | Value2". See the result below.