0.25
0.75
 0.25
 0.75
Scroll right and/or down.
Scroll down.
Scroll right.
start end
end start
0
end end
start start
0
end 0.75
start 0.25
0
start 0.25
end 0.75
0
0.5 0.75
0.5 0.25
0
25px
 25px
25px 0.75
25px 0.25
0
-25px
 -25px
-25px 0.75
-25px 0.25
0
Scroll left.
Scroll up.