According to here: http://www.adminer.org/en/phpmyadmin/
Double clicking on a field in a table should bring up an input field to edit it. But that is not happening in Adminer 4.0.2 (I'm using the MySQL+English verison, in Google Chrome).
Incidentally, that comparison table seems a bit out of date, you should update it for the latest versions. PMA has double-click editing now, adding enums is easier, the "Keyboard shortcucts" thing is fixed, and it now has "New version notifications".