A result table wider than its pane scrolls by statistic: the first one shown,
and the furthest that first can go, which is where the last statistic comes
into view. The table sets max as it draws, so the keys stop where it does.
The Expected editor while it is open: the cadence, and the range as typed. Its
Enter writes them into the draft, and its Esc leaves the draft as it was.
What the data offers Setup’s choices: partition columns, the columns a time
window can split by (and whether they hold times of day), whether there are
files to split by, and the text columns that could be read as time, each with
a few of its values from the rows on screen.
Read column as time through format, or as text again with None. A time
window on a column that is text again has no clock, so the grain goes back to
the whole dataset rather than failing the run.