How can I send multiple documents via email?
Just tap the pencil button in the top right corner and select the documents you want to send. Once selected you can send them by tapping the 'Send to...' button in the bottom left. You can send it by choosing Send email to... or, if you are using a different emailing app, by selecting your app via Share.
Important Note: Some email providers have limits e.g. 10MB or 25MB for the file size of attachments (can be at sender's or receiver's side).