theme_advanced_containers_default_class

This option should contain the default container/panel class name. This option can only be used when theme is set to advanced and when the theme_advanced_layout_manager option is set to the value of "RowLayout".

Example of usage of the theme_advanced_containers_default_class option:

tinyMCE.init({
	...
	theme_advanced_containers_default_class : "myPanelClass"
});