How do layouts refresh?
I have a layout with few tabs and each tab has a portal which is linked to various tables related to the main table for that layout. Some of the portals can be quite large with records or data, likely resulting in slowing down the process as the database gets larger. When the layout is entered or if a script calls for a refresh window, does everything in the layout get refreshed at one time, even if the tab and its related portals are not showing at the time? or does the tab and portal only refresh when they are visible on top?