问题
When I try to use the Chrome Developer Tools, it seems I can no longer view it in a new window.
Is this a bug or was that really an intended change in an update?
How can we open the Chrome Developer Tools in a new window?
Here's a screenshot of what I'm talking about.

回答1:
As of Chrome 52, the UI has changed. When the Developer Tools dialog is open, you select the vertical ellipsis and can then choose the docking position:
Select the icon on the left to open the Chrome Developer Tools in a new window:
Previously
Click and hold the button next to the close button of the Developer Tool in order to reveal the "Undock into separate window" option.

Note: A "press" is not enough in that state.
回答2:
- click on three dots in the top right ->
- click on "Undock into separate window" icon
回答3:
You have to click and hold until the other icon shows up, then slide the mouse down to the icon.
回答4:
Just type ctrl+shift+I in google chrome & you will land in an isolated developer window.
来源:https://stackoverflow.com/questions/23668827/how-to-open-the-chrome-developer-tools-in-a-new-window