don't get rid of highlights

[bosun]

When you give comments to students' writing by email and you don't want your students not to get rid of your highlighted comments, what do you say?
Can I say that

When you return your email, leave the highlighted parts.

[susiedqq]

I'd say:

Do not change the highlighted sentences when responding back by email.



By the way: your question was a double negative
you don't want your students not to get rid of your highlighted comments,

I am sure you meant, you don't want your students to get rid of your highlighted comments.

[RonBee]

Say:

When you return your email, leave the highlighted parts intact.