If you often need to send the same reply to multiple recipients, consider using a Google Lab feature called "Canned Responses" or "Pre-written Replies." This feature allows you to save an email as a template and reuse it repeatedly without the need to copy and paste it into a new window.
Steps
Enable the Canned Responses Feature

Click the gear icon located at the top-right corner of the Gmail window.

Navigate to "Settings" or "Cài đặt".

Click on the "Labs" tab.

Scroll to the "Search for a lab" or "Tìm kiếm lab" section and type "Canned Responses" or "Câu trả lời soạn trước" into the search bar.

Check the box next to "Enable" or "Bật".

Click on "Save Changes" or "Lưu thay đổi".
Create a Pre-written Response

Click on "Compose" or "Soạn". This option is located near the top-left corner of the Gmail window, just above the sidebar.

Create a Template Response. You can either write a new email or copy and paste an existing subject into the compose box.
- Consider bolding or highlighting any details in the response that may need customization in the future, such as names or dates.

Click the arrow next to the trash icon at the bottom-right corner of the compose window.

Select "Canned response" or "Câu trả lời soạn trước" from the menu that appears. Then, click on "New canned response" or "Câu trả lời soạn trước mới" in the submenu.

Name the Response. Choose a name that will remind you of the situation in which to use the pre-written reply, such as "email invitation" or "thank you for coming."
Use a Pre-written Response

Click on "Compose". This option is located near the top-left corner of the Gmail window, just above the sidebar.

Click on "Canned responses" or "Câu trả lời soạn trước".

Click on the name of the response you wish to use. The saved template will appear under the "Insert" or "Chèn" section.

Modify any necessary details.

Send the template email.
Tips
- If you need to update the template response for any reason, insert it into the compose box, make the required edits, and then select the name of the pre-written response under the "Save" button in the "Canned responses" dropdown. Gmail will prompt you to confirm if you want to overwrite the existing response. Click "OK" to proceed.
