need a 'blank' instead of border

[Keyur]

hi!

i am stock cards so in the box where a value goes in i
need a dash or 'blank' instead of a solid border where
people will handwrite stuff. i tried making the border to
transparent and then underline the text. but then the
parameters which dont have any value(since employees will
fill it) wont have underline beside it since there's no
text to be printed. is there a way i can change the border
setting of the boxes so that it looks like a 'blank' when
i print them. other than drawing lines for each of them.

thanks