Here you can specify the new option category display name and code name and select its type. When you enter the values, click the OK button to create a new option category.
Please note that in Kentico CMS any type of product can be assigned with the text product option. This option enables you e.g. to put writing on a T-shirt etc. From the point of view of the user, the option is defined for and assigned to a selected product as any other product option. More details can be found in the Product with the text product option chapter in the Product types section of the E-commerce Guide.