We're expanding this functionality rapidly.
Navigate to any file via the Files index (Reports > Files) or the attachments section of a Property, Unit, Contact, Occupancy, etc.
You will see a page like this:
In the "Shared With" lookup field, find a coManage user with which you'd like to share. Hit Enter.
NOTE: The contact with which you want to share must have already joined coManage. If you wish to send a file to someone that is not on coManage and thus not on the list, simply download it and email it directly - for now.
It should look like this when you're done:
To unshare, simply click the "X" next to the Contact with which you've shared.
This is how it will appear to the user you've shared with:
It's that simple. Mobile-app users cannot currently share files with you but that functionality is coming soon.