.net – How can I switch the build configuration from “Debug” to “Release” in JetBrains IDE Rider with the new UI?

I have configured two build configurations in my solution file like so:

Global
    GlobalSection(SolutionConfigurationPlatforms) = preSolution
        Debug|Any CPU = Debug|Any CPU
        Release|Any CPU = Release|Any CPU
    EndGlobalSection

In the old Rider UI, it was really easy to switch between the two:

Screenshot is from the official documentation: www.jetbrains.com/help/rider/Build_Configurations.html#solution

However, since turning on the in the new UI (which is still in Beta right now), this dropdown is missing and I can’t find a way to change the build configuration. How can I do this?