Actually I have looked into other dialogs (except for New Image witch is actually window, not dialog) do not have title. So I suggest to leave without title.
But on the other hand I see there is missing quick bold text at the top (common practice on dialogs). So I suggest to write a bold text at the top, something like: Image bigger then canvas
Actually I have looked into other dialogs (except for New Image witch is actually window, not dialog) do not have title. So I suggest to leave without title.
But on the other hand I see there is missing quick bold text at the top (common practice on dialogs). So I suggest to write a bold text at the top, something like: Image bigger then canvas