Width
4
−
+
Height
4
−
+
Transform:
⇹
↕
⟲
⟳
←
↓
↑
→
Draw Crease (
d
)
Assign Crease (
a
)
Erase Crease (
e
)
Move Vertex (
m
)
Boundary (
B
)
Mountain (
M
)
Valley (
V
)
Unfolded (
U
)
Cut (
C
)
Absolute fold angle:
+1
+90
−1
−90
Source code on GitHub