The first function of the "scales" tool is to provide an extensive library of scales to play on your guitar or to use in Guitar Pro 6. The software provides a search engine to find scales by keyword ("Blues", "Major", "Minor", etc.).
Each scale is graphically represented with each degree and note in a given tonality. You can play it at any time to check whether its colour can be adapted to your score/tab.
The "Scales" tool can be linked to the virtual fretboard for a graphic representation of the scale you have selected. This allows you, for example, to have a reference for writing a melody or guitar solo on Guitar Pro 6. Conversely, the tool can find the scales that correspond to your composition from a riff or melody you have written.