Make sure you have the same file path as the image below.
background-image css example :
div {
background-image: url('../../uploads/2014/07/bg-css.jpg' );
}
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Gravity Forms Image Upload Field for User Registration
Image Upload Field for User Registration is a Gravity Forms add-on that is specialize for front-end user registration form. It has the ability to upload a user avatar or profile picture during the user registration process. This field has advance settings that can help you adjust the preferred design on the front-end form such as image dimension (width and height), text button, etc. and other settings to enhance front-end layout.
Image Upload Field for User Registration requires Gravity Forms and Gravity Forms User Registration Add-On before install.
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Gravity Forms Media Upload Field
Media Upload Field is a Gravity Forms add-on that allow users to upload an image with advance front-end setup, and easy to use image cropping. This field provide advance settings to manage the image dimension (width and height) and other settings that can be found in the front-end layout.
Many thanks if you are so kind to fairly share this information.