At this point, the attach file custom field is ready to be used as follows:
Step 1: Click on Attach file Icon 
to select a file.
Step 2: Choose a File from the opening window.
Step 3: As depicted in the screenshot below, some information about the uploaded file are available:
- See information about the attached file :
- Who attached the file.
- Configured maximum size.
- Allowed extensions.
2. Delete the file from the custom field.
3. Preview images or save the file.
Step 4: The Attache File Manager controls automatically the attachments according to the administrator's configuration and displays error messages in case of files that do not correspond to the field configuration.
Case 1: The file extensions are different from the configuration.
Case 2: The file size is greater than the defined one
