Hello harish,
Thank you for participating in the Sisense Community!
I think this document may provide the spacing options you are looking for.
You could also use a Dashboard script for more specific control using CSS.
Here is some sample code:
dashboard.on('widgetready',function(d) {
$('.dashboard-layout').css('padding-right', '20px');
$('.dashboard-layout').css('padding-left', '20px');
});
Please note that is sample code. Please consult a qualified developer before implementing this into production.
I hope that helps. Please let us know how it goes!