How to set "full texts" as default for phpMyAdmin?

FIRST: Don't change core files if it is not necessary.

To achieve this in PMA version 4.5.4.1 you just have to add this line to your config.inc.php:

if ( !isset($_REQUEST['pftext'])) $_REQUEST['pftext'] = 'F';

This will always set the results to FULL TEXT per default, and you can switch over if you need to partial

I have an option in the phpMyAdmin: Settings > Main Panel > Browse Mode called: Limit column characters where you can change the default limit of characters (50). But I don't believe you can set it to NOT limit by default...

Starting from phpMyAdmin 5, follow the comment below from Alan Dev : Home -> General settings -> More settings -> Main panel -> Browse mode -> Limit column characters