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Also assume that the seeHazards field has the values "Yes" and "No" as available option answers.
  

1. Add a new Text field to your Form design under the seeHazards field. 
     
2. Give the new field a Data Name such as "hazardsDescription".
     
3. Find the Visibility property on the new field.  
   It's located near the bottom of the properties list, in the Advanced section.
     
4. Now we need to create a formula that will give a True or False result.
   1. When the formula result is True, the field will be shown in the app.
   2. When the result is False, the field will be hidden.
        
5. Enter the following formula into the Visibility property: {{seeHazards}} = 'Yes'

What the above means is that when the seeHazards field is answered with a value of Yes, then the app should show the hazardsDescription field.

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