In the Training set section, you can specify the training documents for different classes.

Icon	Name	Description
	Create a new class	Create a new class. Empty classes have the default name format of classXXXX [X], where The four digits in the class name are the sequential numbers. The number in the square brackets is the number of files in the class. Click the Add training documents () button within the class to fill up the class with training documents.
	Add class(es) by folder(s)	Create a new class from a directory of files. The new class is named after the directory it is created from.
	Delete	Delete a selected class.
	Hide / Unhide	Hide a selected classes.

Icon	Name	Description
	Small images	Change the size of the displayed image thumbnails to small images.
	Medium images	Change the size of the displayed image thumbnails to medium images.
	Large images	Change the size of the displayed image thumbnails to large images.