XnView Software

XnViewMP 1.5.0 64bit
Windows11 (22H2), display resolution 3840x2160, win scaling 150%

Metadata - tag
there is no way to conditionally display text based on tag data,
eg ({Color label}) appearsas as () when tag is empty, which does not look nice

Suggestion
add functionality to conditionally show custom text within tag (if tag is not null or <> empty_string) via

• ternary operator
  eg {{Color label} ? ({Color label}) : ""}
  {{Color label} = "" ? ({Color label}) : ""}
  
  OR

• custom text in tag
  eg {"("Color label ")"}

Related

• suggestions
  Info Panel add check "if exif value exists".

You want to use ternary IF operator, i'd think many users without programming background find regular IF more easy to understand.

it's no more complicated than the IF formula in Excel
I don't mind full if/else notation, but in my opinion it's not necessary here since there shouldn't be a lot of text in these conditional statements

UPD
there is (( )) tag that hides everything inside, if tag(s) has no value