Attaching
Click + (Attach) to the left of the message box:
- Attach file — any kind of file.
- Send photo — pictures only. On a phone this offers the camera as well as the photo library.
You can pick several at once. Each shows as a chip above the message box while it uploads, and photo is noted beside the ones that will display as pictures. Remove one with its × before sending. Add a caption in the box if you like, then send; a message with attachments can be sent with no text at all. The send button stays disabled until every upload has finished.
Limits
- 10MB per file. A larger file is refused before it uploads: … is larger than 10MB.
- Ten per message. Files, photos and linked records together count towards ten per message: A message can carry 10 attachments or links; send these first.
If an upload fails the chip is marked failed; remove it and attach the file again.
How photos are handled
Large photos are scaled down before they are sent, to at most 2048 pixels on the longest side, and saved as JPEG. Photos that are already smaller than that are sent unchanged.
JPEG, PNG, GIF, BMP and WebP pictures appear in the chat as images. Several pictures sent together without a caption appear as a grid of up to four, with a +N on the last tile when there are more. Other files — PDFs, documents, and pictures in formats that cannot be shown in the chat, such as SVG — appear as a card with the file name and size.
Opening an attachment
Click a picture or file card to open it in a preview window titled with the file name. When the message has more than one attachment, the preview shows which one you are on (2 of 5) and the Previous and Next buttons, or the arrow keys, step through them. Download saves the file; Close returns to the chat.
Who can see an attachment
Only the chat's current members, and only for messages they are allowed to see — someone added to a group later cannot open files sent before they joined. Deleting a message deletes its attachments too.