I always struggle with the scrolling behaviour within the dashboard editor. It is very hard to get dashboard items from the left column into a defined space within the dashboard except you want to add something from the bottom of the item list to the last page of the dashboard. While the left menu (where to select the data items) is at a fixed position (and showing the upper items) it won't scroll until you reach the end of the dashboard. So you have to scroll to the end of the dashboard if you want to select a new dashboard item from the end of the list on the left. You have to scroll all the way up if you want this item to be on a free space on the first pages of the dashboard. This is really annoying to create dashboards that way. Even the old dashboard builder in sc14 did this much better.