Hi @wfc
While a slider is not available to personalize your stations, you can use thumbs to help Pandora learn what you like and don't like. Pandora stations adapt with every song to try to find the right music for your stations.
If you'd like more variety in your stations, I'd recommend our Add Variety feature, which will introduce a wider variety of music to your station based on each of the artist or song "seeds" you add. Let me know if you'd like more information on how to add seeds to a station.
Lastly, I recommend trying Pandora Modes. With Pandora Modes, you can take your stations in a variety of directions to further customize your experience*.
Keep in mind that since licensing regulations require a Pandora Premium subscription in order to be able to listen to your station in "Artist Only" mode, free listeners and Pandora Plus subscribers will be able to view an advertisement in order to initiate a complimentary Premium Access session. Those that do will also have access to Pandora Premium's other features during their Premium Access session.
*Not all Pandora Modes will be available on every station.
Hope these features help to further customize your station experience.
HI @wfc
If you're listening on a mobile device, such as an iPhone (and if Modes are available) you'll see a drop down menu at the top of the Now Playing screen.
From there you can choose which Mode you would like to listen to. I've included an example screenshot below of what this may look like. For more info about Modes, feel free to visit our help page Pandora Modes.