Hide an option in a drop down field

Here’s one way you can accomplish this with a Form Rule and a form variable. I am assuming that your choice field on the form is the default list choice column (I’ll call it “InstallOption” for my example). This method will allow you to keep the original (old) choice values in your previous list items, but only show the current values you want the user to select from on a new form. 

1. Open up the form in the New Responsive forms designer.

2. Add and configure a new “Choice - Single” control to your form.

• Title = Install Option  (or whatever Title you want).
• Connected to = Not Connected
• Options = Install, Install with Support, Vendor Install  (the Vendor Assisted Install option is not added)

3. Add and configure a form variable.

• Go to the Variable tab at the top and click “Add form variable”.
• Name = txtInstallOption
• Type = Text
• Value = Form.Install Option  (this is the new control added in Step 2)
• Click Create to add the new form variable.

4. Create and configure a new Form Rule.

• Name = Set InstallOption Value
• If txtInstallOption is filled
• Then InstallOption Value txtInstallOption
• Else InstallOption Value 
• Click the Create Rule button to add this new form rule.

5. Select the original InstallOption control and set the Visible property to No.

• This is the original default control that most likely is still connected to the list column.
• Make sure this control is still connected to the choice control list column.

6. Publish the form and test it out.