"Playing in positions and therefore orientation on the guitar fingerboard is a matter of course, which every guitarist must get acquainted with as soon as possible.  In the higher positions of the guitar fretboard, the fingers of the left hand are less stressed than in 1st position, and this should be taken advantage of to orient the fingering to seemingly more difficult areas. 
It's also a joy to find that the tone quality changes (less use of empty strings and the possibility of vibrato).  Before each piece I list a few notes played in that position. The fingering listed for each note always stays the same, so just settle your fingers in the correct position and respect it. Familiarize yourself with the featured pieces and your guitar will sound much better." Milan Zelenka