I have some dropdowns on dashboard-1 and when I select some data in that dropdowns it appears on that dashboard-1 in table format. when I click on that table data, that data should appear in the dropdowns of dashboard-2. Is this possible? attaching image

Question & Answer
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dashboard-1 & dashboard-2
dashboard-1 & dashboard-21920×2184 173 KB

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If your drop downs are linked to Parameters (and not to filters directly), then it is possible.

You need to create a Navigation action from your first table and set the Parameters accordingly. When the Parameters’ value is changed, any controls (dropdowns) linked to those parameters will be set with the new value.

This explains how to create Navigation actions: Creating and editing custom actions in Amazon QuickSight - Amazon QuickSight