Help Moving From Scale To Scale

sorry about posting this but im a little cofused about shifting to the root notes!
ok say i want to play A minor box 2 then i want to move/slide to box 1 A minor do i have to move/slide to a root note or can i move/slide to a fret that has a root note on mmm as you can see the box below that kris put on when your descending he slides from fret 9 not a root note! on the g string to fret 7 not a root note! BUT HAS A ROOT NOTE ON THE FRET o0.
anyways be very grateful if you could help thx

[Box2--------][Box1]
e|-10-8----------------|
b|------10-8-----------|
g|-----------9\7-------|
d|---------------------|
a|---------------------|
e|---------------------|

[Box1--------][Box2]
e|------------------|
b|------------------|
g|------------------|
d|---------5-7/10---|
a|-----5-7----------|
e|-5-8--------------|

Hello Gmc-e-r-s

hi guys n girls ^^

just thought id pop in n tell you a little something about my self

where i live = uk westyorkshire

name = robert aka rob

age = 23

Tunes = blues / rock / metal

what i think about this site = well i only been here for like a week and kris and his vids really helped me break out of the scales witch i was finding very hard to do! n now im all over the guitar playing some blues so yeah this site kicks ass