Experimental Feature: Overlays - formula not working as expected

[axel.hennig]

In the "Handling Empty Tag Values"
https://www.photools.com/help/imatch/overlays.htm?dl=hid-11
there is the hint to use the following (screenshot):

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I think that does not work as intended. I think to make this work - i.e. row does not show when ISO or Lens is empty - one has to use "prefix" like:

Code Select Expand

-row={File.MD.iso|prefix:ISO:}
I think that's because both rows are not "empty". They contain either "ISO:" or "Lens:".