We can customize how the list item output looks and increase the font size by creating a custom control template. Out of the box, the announcement list does not have a customized mobile view. Even if it did, we would be able to override it with our own. Customizing a control template is fairly easy. Control templates are
aspx files that live in the SharePoint root. We will use Visual Studio to create custom control templates.
The first thing we need to do is create a project that will contain our custom control. Carry out the following steps to create a project: