Is it possible to set organisation-wide defaults that apply to email draft/editor areas within SalesIQ? And signatures?

Like many businesses, we have a set visual identity that includes font/font size/font colour/signature format that all customer communications should be in.

While I know we can set up templates within SalesIQ, staff are still presented with an initial email editor box, which opens set to whatever Zoho system default. They then have to remember to select a template / or they forget, and it's laborious for them to set up to the right design / or we end up with errors... none of which are ideal.

I've noticed it also defaults back to Zoho system font & size in any blank lines - meaning staff might have to reformat mid-response, or if they're not looking out for this issue, can easily send messages out with differing formats from line to line - again, not the image we're looking to present to our customers. 

If users were able to click "respond by email" to a missed chat, and have the editor pre-populate with our corporate identity formatting and an appropriate signature, as standard - that would make the staff experience much more pleasant, and make it much easier to present a clean, seamless public image.

 (We use other products throughout the Zoho Ecosystem, and the ability to set an organisation default font alone that applied across all apps would be amazing 🙏👀
 I've looked on the forum and not been able to find a solution to this yet, but if it already exists, please point me in the right direction!)