In some cases you may have a follow up question that you don't want to appear to all customers, only to those whom you will need follow up information from. In that case you may want to set the question logic to conditionally display a child question based on the response to a parent question.
Make sure that the Parent question is mapped to a field.
You will want at least from mapping if the information is already in your system. If the information is generated as part of this form you will will want From and To mappings. Click here for instructions on mapping to a field.
Click + Add New Question Logic
Fill in the Question Logic Form
Set the Child question as Required and include a validation message.
How the page appears on the portal before you answer
Note that the question in the logic screenshot above is not visible. If you click No you will be able to continue to the next page.
If you click Yes (which our example display logic is using) the field will appear and the validation message to complete it will display
Once the customer fills in a response they can proceed to the next page.