A versioning system is implemented to allow creating, viewing, and editing of query template versions.
When you open a template in Template Designer, select the history icon 
from the fixed action column to access the Version History drop down with the major versions created with Save with comment button, and the minor ones created and grouped in between with the Save button.
Prerequisites
You have created at least one query template in the Template Designer, refer to Creating a query template.
Proceed as follows
- In the Data Explorer, select the desired query template to explore.
→ The Explore view is displayed:
- Select the Open in Template Designer button:
→ The Details tab opens:
- From the upper right corner, select the history icon :
→ the Version History drop down is displayed:
- Each time you want to keep your query template changes, a new version is created. If the change is a minor one, use the Save button to create the co called 'quick save' version. If the 'quick save' versions are more than one, they will be grouped together until a formal version is created with the Save with comment button. Refer to the example above with the '3 quick saves this month' group.
- Optionally, edit the name of a version by selecting the version.
→ The Edit button appears:
- Select the Edit button:
→ The dialog that opens allows you to add or edit the name, which is in the Comment field, and optionally add or remove tags of the version: