How to add more character slots in your select screen of Mugen tutorial

So you want to increase the number of characters you can use in Mugen huh?

Well, I will show you how to do just that, but first you need to ensure that the Screenpack you are using has enough space to add more slots.

Don't worry much if you don't, I will also show you how to decrease the size of the slots, so you can fit more.

Ok, let's get started.

I shouldn't have to tell you, that first of all it would be a good idea for you to backup your system.def on a different folder. Still, just in case, go ahead and make a copy of your system.def.
Ok, on with it then....

Open your data folder, and find the System.def.
Open System.def
(The one you are currently using) and scroll down to find this:
Take a look at rows and columns.

[Select Info]
fadein.time =10
fadeout.time =10
rows =20
columns =12
wrapping =1
pos =93,10
showemptyboxes =1
moveoveremptyboxes =1
cell.size =10,10
cell.spacing =1

Ok, seen the rows and columns?
Those are the amount of slots that are in your select screen.
You can change them to whatever amount you want. Baring in mind that each row and column is multiplied times the number you add.
For instance, let's say you initially have 10 rows and 2 columns, this makes 10x2=20, so you have 20 slots in total.

Let's add the amount of rows and columns you see on my example. That's 20x from left to right (horizontal), and 12x up to down (vertical) columns. Like so:

This time you will have to multiply 20x12 to find out the number of slots you have.
So 20x12= 240
The example shows 240 character slots.
This is taxing however, since it will go off the screen.
But don't worry...

Now, see the pos?

[Select Info]
fadein.time =10
fadeout.time =10
rows =20
columns =12
wrapping =1
pos =93,10
showemptyboxes =1
moveoveremptyboxes =1
cell.size =10,10
cell.spacing =1

This is the position of your selection boxes, so when you are happy with the amount of slots , you must center it to the screen.
Use the pos to do that.
The first number is the Horizontal position, and the second number is the vertical position.
Baring in mind that 0,0 is smack bang in the middle of the screen, but 0,0 it is not in the center of the slots.
The position is counted from slot one, on the far Top,Left.
you must take it from that position and adjust accordingly.
Look at the example as reference.

Some screen packs reduce the cell size when the character select grid is moved further to the left.
If that´s the case, you may not need any further adjustments, but you may decrease the cell size too much.
If that´s the case try the following:

See the Cell Size?
[Select Info]
fadein.time =10
fadeout.time =10
rows =20
columns =12
wrapping =1
pos =93,10
showemptyboxes =1
moveoveremptyboxes =1
cell.size =10,10
cell.spacing =1

Ok, that's the size for your slots, so you have to make it small enough for all the slots to fit on the screen, but not too small that you wont be able to see the character's icon.

NOTES:
You may want to play around a bit with the amount, size and position of slots, until you get it the way you want.

Some screen-packs will decrease the size of the slots/cells too much if you add too many, you can play around with the size a bit, but sometimes it will not make a difference, even if you increase the size of the cells.

You may want to leave your select.def blank, because you will be starting up mugen a lot of times to see if you are happy with the select layout, and Mugen opens a lot quicker if there are no characters to load.

We're almost done, I promise!

One more important thing. If you find the slots cover the character's portrait preview in the select screen, then just put an X on the select.def, so no character goes over the portrait.

Ken
Ryu
X ---- Spaces where character big portrait is displayed in selection screen
X ----
X ----
Chun Li

Last but not least, have the following option like this while you are editing, you can later switch it back to 0 if you wish:

showemptyboxes =1
moveoveremptyboxes =1

That's all I can do for you... the rest is up to you.
It takes quite a few attempts to get this right, but this is the easiest, quickest way to do it.
Unless you download a Screenpack with more slots.