Constants.
Constants are the most simple elements. A constant represent a text line, a symbol or a number. To add a constant enter any text in the line above the template and press [Enter]. The same can be done using [Add item]-Constant.
Constants are usually used to add special symbols, dashes and prefixes to the template, for example, "IMG-" is a good example of a constant for template "IMG-5326.JPG". If you want to add a changeable text, use *TXT varaibles.