Story and Page Filters
Use story and page filters to narrow the scope of your analysis.
Story filters allow you to apply filters for all charts in a story that are based on the same model. They are used for specific dimensions or measures and can apply to all components of a story.
Page filters are the same as story filters, but apply to only one page in a story.
You can also use linked filters, with advanced filter options.

Page and story filters are enabled only after you have added at least one data source to your story.
Prompts
A data source for a chart or table may prompt you to select members before data can be displayed. If the data source you select to create a chart or table requires variables to be set, a prompt will appear when you create the first chart or table that uses the datasource. After the variables are set, the information you provide will be used by all tables and charts that use the same datasource.