Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
With Strategy 10.11, users can consume grid data with collapsible view options. This allows users to easily summarize multiple rows of data based on hierarchies. Users can click within the table to collapse or expand the hierarchy groups, quickly display summary rows, or reveal the details behind data for each group in a hierarchical view. This capability is now available for grids within dossiers, Report Services Documents and Strategy Mobile iOS App.
Open a Dossier, add data, navigate to the Tab format and choose Enable Outline option

Run a Report and click the Outline button

Or navigate to Report Option and choose Outline Mode

User can Expand/Collapse (+/-) the grid from grid header and/or from the individual element in grid
Things to keep in mind when using Outline Mode

KB440763