In Updox? Open up the schedule and you can click and drag on the time slot you want the appointment for. The dragging is important, if you just click, we don't trigger the new appointment dialog. You don't have to drag far, just a couple of pixels, but we that found that without the dragging motion, it was too easy to accidentally click and bring up the dialog. If it annoys us during development, it's definitely going to annoy you during everyday use.
