Using the Show-Hide Rule
Users can use a Show action show a field if a condition is met. Otherwise, this field is hidden.
This example uses a camp registration form with two text fields:
- I am 18 Years Old or Older: a required single selection field with two options: Yes and No.
- Legal Guardian Email Address: a text field that accepts valid email addresses.
Configuring the Show Action Rule
To configure a Show-Hide action rule:
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Click the Rules tab. 
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Click the Add (  ) button. ) button.
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Select I am 18 Years Old or Older from the If dropdown menu. 
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Select Is equal to from the next dropdown menu. 
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Select Value from the third dropdown menu. 
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Select No from the final dropdown menu.  
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In the Actions section, select Show from the dropdown menu. 
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Select Legal Guardian Email Address from the second Options dropdown menu. 
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Click Save when finished.  
Now the Legal Guardian Email Address field appears only if the user selects No in the I am 18 years old or older field.