You have the option to change the order of the icons as well as how you would like them to be displayed:
Change icon order:
On the right side of each icon is located a button, with three lines and two arrows.
Click and hold your mouse(pad) and slide upward or downward to change the order of appearance.
There are 2 display modes available: list or grid.
The icons are displayed by default in "List," but it is possible to change to "Grid" mode. To do this, click on "Display mode."
The "Grid" mode allows you to add a background picture for each button. To add a background picture, click on the pencil in front of a icon and add the image of your choice.
The "Grid" mode is particularly useful when you have a large number of icons.