Try making each row the array have a height of 2 (or 3 or 4 or whatever).
If your note field isn't the first field, that is its a TEXTEDIT already, set HEIGHT=2 (or 3 or 4 or whatever) and if necessary add SCROLLBARS attribute
Otherwise if your note field is the tree widget column, add a dummy column to the 4gl array, and in your form add a field corresponding to this dummy widget that has a height of 2 (or 3 or 4 or whatever) e.g.
IMAGE d = formonly.d, HEIGHT=2;
The height of each row is the same for all rows, you can't have rows shrinking/expanding to fit content. This is because of the protocol that sends only the data corresponding to the visible rows to the front-end. If individual row height varies, this calculation becomes more complex.
Personally I'd also investigate putting a TEXTEDIT field to the right of the tree e.g.
HBOX
TREE
END #TREE
GRID
{
[textedit]
}
END #GRID
END #HBOX
and add a BEFORE ROW that populates this textedit field with the note field for the current row.
Reuben