Custom Dashboard how to modify permissions once created

Custom Dashboard how to modify permissions once created

Dear Team,

I have created several dashboards initially it was only admin and I know have to add operators to view the dashboard.

I am trying to find the option to modify but cannot find the permissions.

The only option I can see so far is to create new dashboard from scratch.
Some dashboards are complex and it will take me hours to recreate them.

Can you please help ?

Thanks,