Single Line Text Box 
To add a Single-Line Text Box field to the User Profile form, click on the following to your left: User Profile Fields> Add New User Profile Field then select Single Line Text Box from the dropdown menu.

The Single-Line Text Box form allows you to add a custom single line text box field to the User Profile form.
Note:
You must click Save for changes to take effect.
Add New User Profile FieldDisplay Page
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