In Chat, select Attach files, or drag files onto the conversation.
Type your question about them and send it.
[Image: The Chat box with two attached files]
Limits
Up to 10 files per message, and 50 MB in total.
Up to 20 MB per file, and 10 MB per image.
Images, PDF, Word (.docx), PowerPoint (.pptx), Excel (.xlsx, .xls), CSV and TSV, and text files such as .txt, .md, .json, .xml or .html.
Audio files aren't supported.
If a file is refused, the message says why: File too large or Unsupported file type.