Scaling, scrolling, and panning.

UI explained:

Scale X (1)
Scale Y (1)
Offset X (0)
Offset Y (0)
20
10
0
17
16
15
14
13
12
11
9
8
7
6
5
4
3
2
1
10
30
25
20
15
10
5
0
10
9
8
7
6
5
4
3
2
1

That's all Folks!