Basically, I want to have a few tic-boxes at the top of the page which, when clicked, will rotate a portion of the image, change a texture, add an overlaid grid, etc. Does anyone know what programs I could use for this, or know of any tutorials? Fat Dragon Games products on RPGnow come on multilayered PDFs which let you switch around textures, so I know it is possible--I just have no idea how to go about it!