To create an HTML-rich template in Gmail, you have two options:

1. Using the Compose Window:

• Open a compose window in Gmail and craft your message exactly as you desire it to appear, including any formatting or images.
• After finalizing your content, click on the "Templates" button located at the bottom of the compose window.
• Choose "Save as Template" from the menu. This action will transfer your composed content into the Template editor, enabling you to save it as a template for future use.

2. Using HTML Directly:

• Alternatively, you can create a template directly from HTML.
• Click the "Template" menu in Gmail and select "New Template."
• On the right side of the formatting tools, you'll find a button represented by "< >." Click on it to switch to HTML mode.
• Here, you can input your HTML code directly to create your desired template.

To include images in your templates:

• While editing your template, click on the "insert/edit image" icon in the formatting option
• You can then either browse your computer for the image file, drag and drop an image, or provide the source code URL for the image.
• Once the image is inserted, click "Okay" to confirm.
• Finish composing your template, and then save it. Your HTML-rich template is now ready for use!
  These methods offer flexibility in creating visually appealing and customized templates for your Gmail messages.