Due to the lack of chord changes, the static chord drone is an excellent basis to get started with superimposing arpeggios and scales over the most common chord shapes. Click on the notation to play the sound of the chord, whereupon you can solo over it with the adjacent arpeggios and scales. Pay attention to the different timbres created by superimposing and note down your favourites.
In the first two lines, the arpeggios are named according to their own root (Amaj, Bmaj, etc). After that (marked as A:) the scales are listed, which always start with root A (A ionian, A lydian, A mixolydian, etc.). The abbreviation HM stands for harmonic minor and MM for melodic minor. If you want to know more about the arpeggios and scales, click on the text and you will be redirected to the corresponding page.
This listing is from the Jamtracks PDF, which also contains the associated sounds. To get the theoretical background of superimposing arpeggios we recommend the detailed 4-page study including videos.