Selected Only
By checking this box only the selected functions are shown.

Select/Weight
To select a function, check the box on the left. By doing this, the function is included in your function set with the default weight of 1. To increase its weight, click the box below Select/Weight and then introduce its weight.

Name
Under this heading is shown the common name of all the mathematical functions used by APS.

Representation
Under this heading is shown how all the functions are represented in Karva notation.

Arity
Under this heading is shown the arity (number of arguments) of all the functions.

Definition
Under this heading is shown the mathematical definition of all APS functions and the definition you gave to all the DDFs.

Add
Opens the Edit DDF window for designing a new DDF.

Edit
Opens the Edit DDF window for editing an existing DDF. To edit a DDF, you must first select the DDF you want to modify, and then click the Edit button.

Remove
Removes an existing DDF. To remove a DDF, you must first select the DDF you want to remove, and then click the Remove button. A less radical way of removing a DDF, consists of unchecking this function or setting its weight to zero. This way you will be able to use it later if you wish.