LesLinq has a separate feature for importing PDF files. When you create a project or open an existing one, you can upload PDF files from the Uploads section, at the left menu bar.
Click on UPLOADS, select UPLOAD media and select the PDF file from your computer. The PDF file now becomes visible in the uploads panel.
To add the PDF file to your project, click on the 3 dots in the PDF file and select ‘Use in this project’