I have Nintex forms for SharePoint on-premise.
My drop down boxes are populated by the SharePoint lists.
I want the first line of the drop down list to be empty. However, the first entry in the list settings turns out to be the first entry in the list.
Even when I add a blank line to the list in settings, the Nintex forms drop down list ignores the blank in settings and shows the first line that has text. I want the drop down list to show the blank.
In the "Appearance" section of dropdown control settings, select Yes for "use custom Please Select value" and then leave "custom select text" as blank, hope it helps
Another thing that I've tried is, in the drop down Control Settings, I set the Default value source to "Specify default value" and then in the Default value box, I inserted a "New Line" formula from the Common tab.
Then I previewed the Nintex form, but there was still no blank line.
Looks strange, the below screenshot is from SP13 Nintex Form, I can see option for custom select text and then can leave it as blank as shown below, and I am using Nintex Forms version 126.96.36.199 Enterprise edition.