Sorry, this isn't very exciting!
Give me a: [%- FOREACH letter_opt IN [ 'A','B','C','D','E','W' ] %] [% letter_opt %] [%- END %]
Magnification: [% FOREACH magnification_opt IN [ 1,2,4,20 ] -%] [%- %][% magnification_opt %]X [% END -%] [%- IF x.defined AND y.defined %]
Selected Position ([% x %],[% y %])