Preview a table's rows from its page
The table page in Settings → Admin → Data gains a Preview tab: the first 100 rows of the table, straight from the warehouse, beside the column list you are modeling.
What you see
Every physical column of the table, values as stored — null stays null, nested fields show a compact preview. The line above the rows tells you whether that is the whole table or only its first rows, and Reload rows fetches them again.
Use it to check what a column really holds before choosing its kind or its grains, or to confirm that a flatten model unnests what you expect.