Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
In Strategy 10, user is able to hide dataset objects in dataset panel in VI dashboard/Dossier by right mouse click on the object and select Hide.

How to show hidden objects?
In the Datasets panel, click the arrow icon in the top right. Point to Show Hidden Objects.Then user is able to select the object to display.

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