I have a spreadsheet with a 15 columns of text data.
Ideally, when you hover over/click on a name in a cell in a column, say
column K. I want it to look up the surname in the full list and display data
in that's in columns H, I,J in a box like a "pop ups" - a bit like a comment
box would show up.

Appreciate any help - not even sure if this is possible

Cassie