This is an expand/collapse menu example that can be created using container states.

Restaurant app.

This prototype shows a subtle animation of avatars flying in, and subtle background tint changes. See how it was created step-by-step: http://docs.proto.io/videos/prototyping-subtle-animation/ >starting at time: 28:40 Enjoy...

Location based app enabling creatives to discover, collaborate and produce together.

If you need to get the Y position of a vertically scrolling container, create a text box. Then on the container scroll trigger, set a variable that evaluates the numerical callback value from the event (Y position). Then add a callback that changes the text property of the text box by reading from the variable.