Add the ability to resize the program window and also the ability to save the watermarked file to a different name

As a photographer I would like the ability to save the file to a different name because I need 2 different files 1 watter marked and 1 not for the customers. Also it is very annoying to have the windows of the program your working be full size all the time I want to be able to resize the window so I can work with files behind it.