Get rid of green box around letters and symbols in worksheet and make them not printable!

[RZ_10393200]

Please advise how to get rid of the little green box around letters and symbols in worksheet and make them not printable.

it's annoying me.

Thanks, 

Ruoshi 

[Werner_E · Accepted solution]

Its a feature which you can easily disable -> https://community.ptc.com/t5/Mathcad/How-to-remove-green-outline-around-duplicate-variables-in-Prime/m-p/813912/highlight/true#M202187