Installation

Go to `chrome://extensions``
Enable developer mode
Click "load unpacked", and select extracted plugin folder.
Pin the graffiti extension to the toolbar
Go to chrome://extensions/shortcuts and set "Ctrl+Shift+A" for "Add to graph", "Ctrl+Shift+X" for "Add to graph with edge info" and "Ctrl+Shift+Q" for "Add line to graph"

Usage

Press The graffiti icon in the toolbar, and then connect the server.
Now you can use the shortcuts you configured above when your mouse is above a text in line
Alternatively, right click on non-link inside a line and choose graffiti from the menu