Edit email message sent via Contact Owner form from Item detail pages

In “guide” type themes like CityGuide or Directory+ can be contacted owner of Item post via Contact Owner form.
Email message which is sent over this form can be configured in Theme Options > Item Detail Options page under Contact Owner section:

Default message can be changed and extended using placeholders like: {user-name}, {user-message}, {user-email}, {subject}
All of these placeholders are in email message replaced with values filled by visitor in the form.

So email message can also look like: