Google Chrome disable screen ruler

google-chrome

This is an old question, but now you can enable or disable now in Chrome Developer Tools -> Settings -> Show Rulers (you can also access the settings just pressing F1).

How to enable or disable rulers in Chrome


In Chrome 38, there is a "Toggle Device Mode" button to the left of menu items in developer tools. Clicking on it will toggle display of ruler and device emulation list.

The Toggle Device Mode Button is the second from the left and highlights blue when active

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