When closing the Datamart editor my different layouts are not saved. All my table arrangements are gone upon opening again.
v-yingjl there really isn't much more to add. If you build a new layout in the model tab of a datamart, add your tables and build relationships for that layout, it will disappear at some point. Cause is unknown as there is no option to save (layouts are autosaved). I had 3 layouts saved prior to today and all had been there for a week or so. I created a new layout with new table today and boom, all layouts have disappeared and I am back to only having the "all tables" default layout. This makes working with multiple tables in a datamart difficult.