A quick calendar view should be easily accessible each time you click on a new client within the messaging page. You shouldn't have to open a new tab for each client and THEN click on the calendar. It is far too time-consuming. Instead, have a calendar view open on the far right side within the messaging page instead of "PDF Attachments." This would allow to see critical data (workouts, comments, habits, etc) and send quick messages without having to do 3 more button clicks and wait for load times.