What is a slide out panel?
A slide-out modal is a panel that slides in above the main view, leaving the underlying content partially visible.
Are sliders good UI?
Sliders are excellent UI controls, but they are not one-fits-all tool. They are good when users want something that is relative, but not very good for exact values. When designing a slider, measure interaction cost and make sure that the users can select that range (or single value) correctly from the first attempt.
What is overlay UI?
An overlay provides contextual information and options in form of an additional layer on top of the current state of the interface. They are either purposefully interruptive like modals or augmenting like popovers and tooltips.