Mail Merge Template - remove blank rows in a table

[Litmus]

Hello


I have a set of student grades in a spreadsheet.

Not all students study the same subjects. I'd like to run a mail merge reports for individual students that removes the subjects (hence rows in a table) that aren't studied and keep those that are i.e. those with grades.

See attachment.

Apologies if there is already a thread - I found related ones but not a specific one.