To send a document in a conversation:

1. Tap on the “Messages” tab in the navigation bar at the bottom of your screen.
2. Locate the relevant conversation/channel and tap on it.
3. At the bottom of your screen, you will see an attachment icon. Tap on it.
4. Select the document that you wish to send. (You might need to grant the app permission to access your media. If this is the case, tap “Allow” on the popup box that appears).
5. You can add a caption to the document if you wish to do so.
6. When you are done, tap the arrow on the right side of your screen to send