How can an administrator allow all internal users to view a dashboard as a Sales Manager within a sales region?

By setting the dashboard's 'Run As' user to a specific Sales Manager, all internal users who view that dashboard will see the data through the lens of the Sales Manager's security settings and record access, ensuring a consistent view across all viewers.

Creating a dashboard for all opportunities in the region defines the content, not how the data is viewed relative to different user permissions.

Creating a dashboard with multiple components describes its visual complexity, not how data access is controlled for different users.

Running a dashboard as the 'logged-in user' would result in each user seeing data according to their *own* permissions, which would not provide the consistent view of a Sales Manager.