[filburt1]

Forgot the four (!) most important ones:

// $textoffsetpxx is the x-offset of the main text in pixels
// $textoffsetpxy is the y-offset of the main text in pixels
// $shadowoffsetpxx is the x-offset of the shadow relative to the main text
// $shadowoffsetpxy is the y-offset of the shadow relative to the main text

English:

textoffsetpxx: the number of pixels from the left edge horizontally of the image to draw the text
textoffsetpxy: Same as textoffsetpxx, but pixels from the top edge vertically
shadowoffsetpxx: The number of pixels relative to textoffsetpxx horizontally to shift the shadow. For example, -3 would be three pixels to the left. 8 would be 8 to the right. 0 would be no shift.
shadowoffsetpxy: Same as shadowoffsetpxx but a vertical shift. Negative is up, positive is down.

Screenshot: