No worries.
By way of example, if you go with
rows = 5 and
cols = 3 setting
origin = "BOTTOMLEFT" and
orientation = "VERTICAL" then the buttons would number like this...
Code:
[5] [10] [15]
[4] [9] [14]
[3] [8] [13]
[2] [7] [12]
[1] [6] [11]
.
If you change that to
orientation = "HORIZONTAL" then the bars would fill like this...
Code:
[13] [14] [15]
[10] [11] [12]
[7] [8] [9]
[4] [5] [6]
[1] [2] [3]
.
Change the origin to "BOTTOMRIGHT" and the numbers would reverse depending on the orientation...
Code:
[15] [10] [5] or [15] [14] [13]
[14] [9] [4] [12] [11] [10]
[13] [8] [3] [9] [8] [7]
[12] [7] [2] [6] [5] [4]
[11] [6] [1] [3] [2] [1]