How can I attach multiple documents when applying for a DTV in the UK using the e-visa website?

Applying for the DTV visa in the UK requires attaching multiple documents, but users often encounter limitations on the e-visa website. To resolve this, several suggestions have been shared, including merging all required documents into a single PDF file using tools like 'ilovepdf.com' or other PDF merger applications. Additionally, it was noted that applicants might have the opportunity to attach extra documents after the initial submission.