Append MxN selected tiles as new images.
is set to 0, number of rows is estimated automatically.
is set to 0, number of columns is estimated automatically.
are both set to 0
, auto-mode is used.
is set to 0, only a single image is produced.
tells about the centering of tiles when they have different sizes.
M=0, N=0, centering_x=centering_y=0.5.
Example of use: