conditional formatting: making field transparent to see label underneath
I want a label to appear on the last row of a portal 'New' but not be seen once the row begins to be filled. I have set this field to transparent fill and have conditional formatting of 'Not Is Empty [field]' to give it a white fill once data is entered. I have an example file in which this works, but the current solution doesn't; I can't spot any differences.
The field does indeed appear transparent in Layout mode but has the white background in Browse. I can only see the underlying label if I click into this row, not otherwise.