Problems wit new embed code and multiple calendars

I am the webmaster for a charity, and we use Zoho calendars to inform our members of meeting dates, fund raising events, etc.

We previously had a calendar embedded on our membership-only website, and a single calendar showed events from multiple sub-calendars(?), overlaid on the same calendar grid, with one colour for events from the "meetings" calendar, a different colour for events from "fund raising", etc.

I was informed by our chairman this week that the embedded calendar had stopped working, and on investigating I found that you have changed the embed code. I have updated our site and the calendar is now embedding once again, HOWEVER - I can't see how to show multiple calendars on one grid like I did before. I can show one calendar OR another, but not several all together.

I can't find any documentation that really explains the embed URL options, or how I might be able to specify multiple calendar IDs within the URL.

Can you please let me know how I can make the new embed code behave in the way the old calendar embed used to, and show multiple calendars in one embedded item?

Zoho Desk Resources

Desk Community Learning Series
Digest
Functions
Meetups
Kbase
Resources
Glossary
Desk Marketplace
MVP Corner
Word of the Day

Topic Participants
Dave
Gopinath D ZMail

Sticky Posts
The year that was at Zoho Calendar 2023- Part 2
In continuation with our previous post on all the exciting updates and improvements that have shaped Zoho Calendar over the past 12 months, Lets delve into more: Bring your calendars together- Introducing Zoho Calendar and Outlook calendar synchronisation