Shearing is best understood by example. Please visit tutorial page for examples.

WARNING: FireFox cannot correctly run a shearing effect.
This bug in FireFox has been submitted to Bugzilla (661452)
See the tutorial for more details.

create shear as MyShear where rate=3 until=1 type=x completion=Done end


specify a routine to run when the shearing is complete.
a shear rate per second. Use a negative value as appropriate.
specify in which direction to shear the sprite. If type is not specified the shearing is performed both ways.
the value at which the shearing should end. Be sure this number makes sense with respect to the initial size of the sprite and the rate being negative or positive.