Follow for dummys

Hi I was looked at many guides and all seem super hard to understand, someone could explain me how to make my slave follow my main pressing F6 step by step without missing anything please?

[lax]

The guide you need to look at is the one here on ISBoxer.com, linked from the main SWTOR "HOWTO Launch multiple instances"...

Quick Start Guide 40, Part 4: Gameplay as a multiboxer discusses this topic and directly underneath that under "Start Customizing" it's got:
* Many of the most common modifications you might want are explained in detail, such as:
** The game's Key Bindings - tell ISBoxer about them in order to enable Formations and Follow and Assist hotkeys