Hi Lynn,
Could you let me more details that why would you like to change Marketing Email Template instead of add dynamic contents to Marketing email ?
As per my understanding for your Context and "deployed locations", do you want to present different logo to clients based on their location ?
If so, it could be done with dynamic contents like below:


<p>
{{#if (eq contact.address1_city 'Los Angeles')}}
Hello
<br>
<img src="la.png">
{{else if (eq contact.address1_city 'Moscow')}}
Привет
<br>
<img src="moscow.png">
{{/if}}
{{contact.firstname}}!
</p>
Change is reflected by the data of members in segment, and you just add code in Marketing email instead of Marketing email template.
In a word, dynamic content is the only thing I could relate to "Change",
please point it out if I have misunderstanding for your real requirement.
Regards,
Clofly