OK, CANCEL
"layer" TextBox(value), Button(value wizard)

CheckBox:  "Picture File"
	Textbox(pictureFile), "pick picture" button
		dialog:  PictureList,  ScrollBar, Preview,  OK, CANCEL

CheckBox:  "Change Coordinates"
	Radio:  (Map-relative / Screen-relative)
	"X" TextBox(value), Button(value wizard)
	"Y" TextBox(value), Button(value wizard)

CheckBox:  "Change Rotation"
	"Rotation" TextBox(value), Button(value wizard)

CheckBox:  "Change Opacity"
	"Opacity" TextBox(value), Button(value wizard)

CheckBox:  "Change Size"
	"Size" TextBox(value), Button(value wizard)

CheckBox:  "Change Blur"
	"Blur" numberStepper
	preview effect

CheckBox:  "Transition Time"  (Only applied to existing pictures)
	"Time" TextBox(value), Button(value wizard)
	(ignored if it's a new picture)

DropList:  "Blending"	(takes effect immediately)
	- Normal
	- Add
	- Subtract
	- Overlay



(Use ZigoEngine)
(if a variable textbox is empty, the numberStepper's value takes effect)