Loop setting

 So..if i want to set the loop lenght BEFORE i activate loop?Yes,i can set memory loop in Rekordbox..but i usually in a song decide or set a loop at the moment(gosh,i'm human and my mixes are not prepared..it's called..IDEAS during a set)So,can we have an option to decide if the two buttons that normally set the loop in\out(i've a DDJ 1000 but on most other Pio's device are tha same)can be used to decide the loop lenght and then activate with the activation button?The standard loop is 4beat when use the activation button but if i want\need a 2 or 1 beatloop on the fly i must activate the loop and immediatly push a couple of time the 1\2 loop button..For now i solved with midi mapping and i've assigned 2 beat autoloop to the loop in button and 8 beat autoloop to the loop out button so i can have 2\4\8 beat loop ready on the fly..