Image Field Type In WordPress

Here, is choose the field type is Image.

The Image field allows an image to be uploaded and selected by using the native WordPress media modal.

• Return Format
  Specifies the format of the returned data. Choose from Object (array), URL (string), or ID (integer).
• Preview Size
  The WordPress image size displayed when editing values.
• Library
  Limits file selection to only those that have been uploaded to this post, or the entire library.
• Minimum
  Adds upload validation for minimum width in pixels (integer), height in pixels (integer) and filesize in MB (integer). The filesize may also be entered as a string containing the unit. eg. '400KB'.
• Maximum
  Adds upload validation for maximum width, height and filesize.
• Allowed File Types
  Adds upload validation for specific file types. Enter a comma separated list to specify which file types are allowed or leave blank to accept all types.