Devtools are fixed size and can't be changed with the mouse to change the width and height.

[gaollg]

Hello there:
     My Chrome "developer tools" (devtools) are fixed size and can't be changed with the mouse to change the width and height.

Google Chrome Version: 77.0.3865.120

[meooxx]

Google Chrome Google Chrome 已是最新版本 版本 80.0.3987.122（正式版本） （64 位）