i am using trial version of chargebee..where can i see plan renewal option?
If you would like to change the site level currency, you can do that under Settings>Site Settings>Site Info.
Plan level currency however is not supported.
With ChargeBee, you can create plans and configure the billing interval for your renewals. Based on the plan selected, your subscriptions will renew automatically.
Here's more on that:
To create a new plan, go to Product Catalog > Create a New Plan. You can then specify your plan cost and frequency as shown below: