If I understand what you need, you can specify the height of your dashboard. When you edit the dashboard, use the pulldown under SIZE near the upper left.
Pick any size you want. (There might be some limit, but I've done this before with some pretty big dashboards.)
Your dashboard will have vertical a scrollbar that lets you get to the bottom.
Thank you for the suggestion, I got 2 kinds of users for the dashboard.. laptop and desktop users.. is it ok to go with custom size I given the size of (1000*3000), will the dashboard get just for the laptop user or not. Whether I need to create device layouts or can I go with the custom of size that will be useful for both of the users
lap top browser(800*600)
so can I go with the custom size..like(800*3000) or (1000*3000).. please suggest me with the sizing that can be useful for both the user.
I can't suggest sizing because I've never sized dashboards for different device types, but the numbers you gave would be the place I would start if I were doing this.
thank you Joe