Any new viewing request will ping you a notification allowing you to view the request in the notifications tab.
Alternatively, you can access these requests on the viewings tab giving you an overview of all received viewing requests it also shows historic requests that have been accepted or rejected.
Once you select the viewing that you’d like to accept or reject, you will be directed to a popup allowing you to accept or request the requested.
AS you've accepted the request it'll add these viewings to your list of upcoming viewings on the management view of the dashboard, calendar and of course the viewings tab.
If the request was rejected by you, the request will move down the viewings tab and gets cancelled.