If you used a template or created a signature template for Microsoft Office 365 or Google Workspace from scratch, you can add or remove several fields accordingly to your needs from the list on the left, edit your text and/or add images, etc.
To edit the signature, in Templates, click EDIT:
To add new fields in your template, first click in the blank, so the cursor exists as a placeholder in the template.
Then select the field you want, drag and drop where the cursor is:
Clicking the “Preview” button will show how it will look in its public state:
Clicking the “Reset” button, you’ll roll back to the last change you’ve made:
Click the OK button to save your new template.
In case you need to add a social media link in your signature, you have to use a pre-made template.
The social media options are not available in the custom signature template and you will not be able to re-add a social media icon if you remove it from the template.
To add the link of your social media, select it and click on the link (chain) icon in the editor:
In the pop-up window, add the address of your social media and click SAVE:
To add a new image to your signature, click on the image button:
Upload an image from your local storage and click the save button:
More Information:
Product : Free Email Signature Management tool for Google Apps