You're looking at a Query1 (Order),
then "when row is expanded" runs Query2 (Line),
then "when row is expanded" starts a process that has 1 rule: VIEW Line USING Options_HTML NOEDIT
I need to remove that wasted area shown by the ARROW.
I would like to, but cannot due to a bug, do this with a HTML Template in the "when row is expanded" function, instead I have to have a FORM with 1 HTML cell. The output in the light blue "Options" area comes from HTML with some CSS formatting. But I'm losing room above it.

by setting the top padding to 0px, i was able to remove some of the space, but can't find the rest:

There doesn't seem to be any parameters I can adjust on these DIVs:

I'm not sure this is enough for anyone to go on, since you can't actively look at the Inspector to fish around, but any ideas would be appreciated.
thx