How to edit custom layout in Azahar?

[rrrcabral]

Before in Citra I knew how to edit because there were other tags/code patterns.

In Citra the code was like this:
(this makes the image on the top screen fill as much of a 1080p screen as possible and stay centered. And the bottom screen becomes small at 1x the size on the right centered vertically)

custom_layout\default=false
custom_layout=true
custom_top_left\default=false
custom_top_left=60
custom_top_top\default=true
custom_top_top=0
custom_top_right\default=false
custom_top_right=1860
custom_top_bottom\default=false
custom_top_bottom=1080
custom_bottom_left\default=false
custom_bottom_left=1540
custom_bottom_top\default=false
custom_bottom_top=420
custom_bottom_right\default=false
custom_bottom_right=1860
custom_bottom_bottom\default=false
custom_bottom_bottom=660

but now Azahar changed some tags and I got lost,
I tried this and only screen appeared black:

custom_layout\default=false
custom_layout=true
custom_top_x\default=false
custom_top_x=60
custom_top_y\default=true
custom_top_y=0
custom_top_width\default=false
custom_top_width=1800
custom_top_height\default=false
custom_top_height=1080
custom_bottom_x\default=false
custom_bottom_x=1600
custom_bottom_y\default=false
custom_bottom_y=420
custom_bottom_width\default=false
custom_bottom_width=320
custom_bottom_height\default=false
custom_bottom_height=240

(I think I've done the pixel positioning calculations right. the problem is with the tags/code, I must not be using the new ones correctly, omitting something, missing something)

but I made a good discovery, changing "layout_option" to "6" makes the custom layout the default when opening the emulator.