This page of dotCover options allows you to choose the keyboard shortcuts scheme.
You can switch between two default keyboard shortcut schemes or choose None to configure ReSharper shortcuts yourself, in Visual Studio options ( ). Click Apply to apply the selected scheme. For more information, see Configure keyboard shortcuts.
Applies the selected keyboard shortcut scheme. Note that the selected scheme is not saved in the settings.
Use Alt+R shortcut to open ReSharper main menu
If you use Visual Studio 2019 or later, the ReSharper menu gets hidden inside the Extensions menu, that's why dotCover allows you to press Alt+R to quickly access its menu commands.
Note that Alt+R is used in some Visual Studio UI elements, for example, in the Find and Replace popup it will replace the next occurrence. If you use it this way or if you have assigned it to another action, disable this option.