Now it’s time to start building the solution. The first step is to identify or create the site or site collection that will contain the required lists and pages. The solution can be built within an existing site or in a new site. Once the site has been identified, the lists and pages will be created and customized using the web interface and SharePoint Designer. Site Owner or Site Administrator permissions are required for many of the following steps.
For this scenario, you’re using an existing site and adding functionality specific to appointment keeping.
To use the reservation functionality for the site, you need to enable the site feature called Group Work Lists:
On the site home page, ...