plan appointments closely to each other

I like that appointments are as closely as possible. So for example: I work from 8:00 a.m. to 17:00. I do not want an appointment at 08.00 and at 16.30 again and not the rest of the day. Is there a possibility to connect to this show?
For example, there is one appointment scheduled at 12.00, which initially only the possibilities around that time are visible?