In the json file for the PB theme, is there a way to highlight an image when it is hovered over? When you hover over a picture button, the image has a 'highlight'. I want to do the same for an image file. Also, how does the theme link objects in the theme to the objects in PB? In other words, for:
"picturebutton":
{
"drawing":true,
"normal-state":
{
"border-color":"#4D4D4D",
"background-color":"#4D4D4D",
"text-font":{"color":"#CCCCCC"}
How does PB know to modify the picturebutton?