Telemetry Perspective primarily provides the Telemetry overview for components selected in the Topology View. Sometimes the Topology selection can be too big to transfer it to a readable Telemetry dashboard. Component number restriction for Telemetry Perspective is set to 5 by default. There is no limit on the number of relations. In situations when you open the Telemetry Perspective from a Topology selection and there's a lot of charts for 5 pre-selected components with unhealthy or changed state, you can narrow it further down. Follow the instructions below:
On the top ribbon there is a dropdown menu that informs how many components are selected for the Telemetry Perspective (1). Unfold it to see all components selected for the current Telemetry Perspective:
Each component has an "x" button next it's name. Click on the "x" button to remove the component from the dropdown list.
Note: If there are no components selected for the Telemetry Perspective, the dropdown menu contains an input field, where you can start typing component names that you want to see Telemetry for.