Thanks for using the plugin and for your question. There are two different ways to "make a list":
1) If you are using the MLA admin screen and want to see the PDF files, you can click the "Application" view just below the screen title. That will display all of the files with the "application" MIME Type, including the PDFs. You can click on "Screen Options" in the upper-right corner of the screen to check the box next to "MIME Type", making this column visible. You can then click on the MIME Type column header to sort the display by type, so all the PDFs are in one place.
2) If you want to make a post or page with a list of the PDFs, you can use the [mla_gallery] shortcode. You can insert this shortcode in the body of your post/page to add a gallery of PDFs:
[mla_gallery post_mime_type=application/pdf post_parent=all size=icon link=file]
The parameters in the above example select just the PDFs (
post_mime_type=application/pdf), show all of the PDFs regardless of what post/page they are attached to (
post_parent=all), display an appropriate icon (
size=icon) since PDFs are not images and makes each icon a link (
link=file) to the corresponding PDF file.
The PDFs will be listed in the gallery even if they are unattached, and the Caption field will be displayed under the icon for each file.
I hope that answers your question. Please let me know if you need more information or have any problems getting what you want. Thanks for using the plugin!