Mac OS X - File Open Dialog: Can't sort or resize columns

mac

I'm having a problem where when I go to File > Open; I can't resize the different columns.

enter image description here


Set the arrange by mode to none:

Related

Can't install apps from App Store on iPhone with iOS 7 [closed]
Safari 7 can't connect to intranet using HTTP authentication
Force Mac to display in grayscale
Is it Possible To Move Menu Bar To Applications
Set Mac to use Wifi for Internet, Ethernet for local file transfer
On reboot system asking for keychain password for local items
Spotlight crashes after two letters have been entered
Enable Terminal / iterm2 sound notification exclusively
How to make Mac's mouse icon to be left hand friendly?
External hard drive knocks out wifi Internet
macOS Sierra "System" files eating up disk space [duplicate]
How can I kill the Jenkins process?