I need help adding a custom button to Gmail’s email composition interface.
I’ve been exploring ways to integrate a button directly into the compose window’s toolbar area. I noticed that Gmail Labs features include buttons like “Send & Archive” and image insertion tools, which suggests this functionality exists.
After reviewing the Gmail API documentation, I found options for sidebar widgets and context-sensitive gadgets that respond to message content. However, neither approach seems to support toolbar button integration for the compose interface.
Has anyone successfully implemented this type of customization? I’m open to alternative solutions including browser extensions or custom scripts if the official API doesn’t support this feature.
Any guidance or examples would be really helpful. Thanks in advance!