This operator specifies explicity the current transformation
matrix. The argument elements *a* *b* *c* *d*
make up the elements of a 2 by 2 matrix. This is the linear transformation
part of the affine transformation. The translation is specified
by *tx* and *ty* for the x and y directions respectively.

This operator pushes saves a copy of the current graphics state The graphics state consists of (among other things):

- Current Transformation Matrix
- Current Path
- Clip Path
- Current Color
- Current Font
- Current Gray Value

Sets the current graphics state to the last graphics state saved with gsave.

This operator rotates the current frame of reference by *angle*
degrees counter-clockwise.

This operator scales the current frame of reference by a factor of *x-scale* in the x direction and *y-scale* in the y direction.

This operator translates the current frame of reference by *x-shift*
in the x direction and *y-shift* in the y direction.

David Maxwell, who is still writing this, would like to hear your comments and suggestions. And remember, parts of this manual are based on P.J. Weingartner's work: A First Guide to PostScript.