via hole grounding in layout

[sandeepsreeman]

hi frnds iam designing a combline filter in the layout window of momentum(ADS) iam getting problem how to define a via hole grounding and how to place a via hole ground on to the resonators(since my resonators should be short circuited to ground) whether i have to modify the subrate layers and metallzation layers for creating a via hole ground.....? in the component pallete there is a component called via hole to ground is there whether we can place directly that component onto the resonators so that resonators will be shortcircuited to ground or not??
plzzzzzzzz help