Attach resized files to the PDF

[Technology-Solutions]

Hi, great plugin. How can it be integrated with the placeholders functions of files uploaded with RSFORM?
https://www.rsjoomla.com/support/documentation/rsform-pro/form-fields/file-upload.html

In detail, in the generation of the PDF I use {your_field_name: localimage} and so I upload an image. But the problem occurs when the files are too large, the email is not sent. So I wanted to use this plugin, but how specific which file should I use in the attachment of the PDF?