To define the Menu icon and Expanded Panel, please go to ART Theme > Theme Options > Header.
You could set the menu icon style, size, and spacing.
You could define the icon size by the icon height option. Please enter the integer number. It will be shown by the default size if they are empty. The default for Desktop is 26, for Mobile is 16.
The expanded panel will be shown when menu icon is clicked.
There are the options for spacing of menu items and align.
Notice: The “Expanded Panel Bottom Layout” and “Search Icon Size” were added in the V3.4
If you want to define the color(Background color and element color) for the Expanded panel, please go to Theme Options > Colors: Expanded Panel
Notice: From v3.4, the Expanded Panel Bottom Layout color options were added, the “Menu & Logo Color on the Expanded Color” in Page/Portfolio editing were removed.