Problem to Solve: For users who want to move a constant reference line in a visualization without having to key in a specific value.
Existing Workarounds: Parameter actions allow you to structure a reference line in a way that it will change when you click on specific marks but not a continuous range of values in the view.
Idea: Allow a user to click and drag a constant reference line to reset its constant value. This could be turned off by the workbook author in case they do not want their audience to move the reference line.
- I believe draggable reference line functionality exists in IBM SPSS