JAlbum does not modify your original images in any way. It only adds a few files and folders to the folder you selected for album creation. Jalbum also knows how to handle folder trees. JAlbum accepts jpeg, gif and png files as well as movie files .avi, .mpg and .wmv
You can easily change the appearance of your album thanks to the user interface (color , theme, dimensions, navigation buttons, layout etc) by selecting from a list a "skins" and an existing style.