If you are drawing rotated, skewed or otherwise transformed
images any canvas initialization will be determined by a rectangle
drawn around the boundary of the transformed image.
When you apply transforms to an object you may shift it off the
canvas. To allow you to pin a transformed object to a particular
location you can use the 'Pin' transform parameter. Additionally
you can use the 'LimitWidth' and 'LimitHeight' parameters to limit
the width and height of the final image.
Note that transforms are applied after positioning and fit
parameters which means that if you combine the two your canvas may
not autosize as expected.