I need to enable pcmanfm (aka file explorer) to copy and paste from all directories for programing purposes. Can anyone tell me how to do this?
Close all file manager windows and start it again from command line:
sudo pcmanfm
This will let you do anything root
could do. Make sure you don't accidentally drang-and-drop /usr
into /lib
or something like that: there will be nothing protecting you from such folly.