Build - Tags Details
When you select any service on your template, for example: subnet and click on View/Edit Tags, it will open a confirmation message about setting mandatory template tags.
Click on OK to continue.
In the following window, you will be able to set your template tagging. You can modify these tags on Tagging section. To conclude, click on Save button.
After you have set the tags, if you click again in View/Edit Tags you will see the configuration that you have set.