As an employee if you're looking to request PTO, after you login and click on the "Add New" button from the time card. You can now select dates to add, and you can add all at once. Note that you can only add PTO to current and future dates.
You can also request PTO directly from the calendar. Once logged into the website (the calendar isn't on the smartphone apps just yet) click on the "View PTO Summary" button. You'll see your PTO calendar, and you can then click on the "+PTO" button to request.