How to add sub-clauses while creating a terms template?

Summary

We are trying to add sub-clauses to a clause while creating a terms template.

Content

While creating a terms template, we would want to include sub-clauses under a clause, for now we are not able to achieve this. 

For example: 

6.1 Late Delivery: 

If a shipment of a Purchase Order will not be delivered On-Time, Supplier shall immediately notify **** in writing, giving pertinent details; provided, however, that such notice shall be informational only, and its receipt by **** shall not be construed as a waiver by **** of any delivery schedule or designated delivery date or of any rights or remedies provided to **** by the terms and conditions of this Agreement or by law.   In the event of Late Delivery, **** may, at its discretion, implement all or any of the following:-