Select the desired files/folder you would like to discuss or bring attention to then select the Notify icon
As a User you can notify the Account Admin, Account Users, or User Groups from that Account.
Select contacts on the left and using green arrow button add them to the Recipients list on the right - you can also double-click contacts to add them to Recipients. Remove Recipients with the back arrow
Send yourself a message by selecting the checkbox in front of Send a Copy to Myself
Next add a subject in theSubject box and a message in the Message box and then select the SEND - recipients of a notification will receive an email with the included Subject / Message