Combining the high 2nd finger (1st grip) and the low 2nd finger (2nd grip)
See how the flat/natural (G-string) and the natural/sharp (D- A- E-string) determines if we
have a low or high second finger.
Look at the beginning of each staff where you will see the key signature.
The flats or sharps affect the according notes on the whole staff and all octaves.
Downloads of pages and backing-tracks are the black buttons below the video.