Can I edit the plain text version of my campaign separately from the HMTL version?

Can I edit the plain text version of my campaign separately from the HMTL version?

I have a campaign and I have uploaded the HTML and that works great. However I would like the plain text version of this email to read differently than the HTML version. In other campaign managers I've used you can edit the HTML version and also edit the Plain text version so you can get your email just right. Is there a way I can do this in zoho campaign?

Thanks,

David.