Group General Properties.

"Designation of the group" The folder is used for joining several columns with common topics. E.g. for joining several columns containing weather forecasts information.
"Group title" It is displayed in the group header. It enables one to specify the topic of the folder.
"Use Icon" To specify a particular set of columns an icon can also be used together with the group title.
"The number columns in a group" This option determines the number of columns in a line. It can vary from 1 to 4. It is 2 by default.
What is the way to add the custom group icon? Find icons.xml file that is in Theme/Icons file relative to the program path.Then go on at your own discretion.