How to configure real position of endstop

My Y endstop is triggered out of the y border of the bed, and I would like to register this.
Recently, I comanded the bed leveling and the points at the ymax border could not be achieved.
By the way, is there a method for calibrating bed leveling with BLTouch?
Also, how can I update this information of real position of the endstops and the limits of printing in y axis?
Thanks!

It depends on your firmware

In Marlin its these settings

#define X_BED_SIZE 200
#define Y_BED_SIZE 200

#define X_MIN_POS 0
#define Y_MIN_POS 0
#define X_MAX_POS X_BED_SIZE
#define Y_MAX_POS Y_BED_SIZE


If you home to Y min then Y_MIN_POS is the postion of that endstop, if you home to Y max then Y_MAX_POS is the position of that endstop

often min values are less than 0

But what if when the endstop is triggered the nozzle is not at the border?
I mean, if it is, for example, at 20mm from the border, over the bed.

then its a poorly built machine and effectily that part of the bed does not exist, as the machine cannot put the nozzle over it

Then the home position is 0, and you measure the bed size from that line

Then what I did was to make some adjustable end stop mounts so when activated position is correct.

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Computer Programmer / Electronics Technician