or displaying simple one-button window that allows you to select directories to open on demandwhen no initial directory is given or present (see the code' __main__ logicpyphoto also lets you open additional folders in new thumbnail windowsby pressing the key on your keyboard in either thumbnail or an image window figure - for instancecaptures the pop-up window produced in windows to select new image folderand figure - shows the result when select directory copied from one of my digital camera cards--this is second pyphoto thumbnail window on the display figure - is also opened by the one-button window if no initial directory is available when thumbnail is selectedthe image is displayed in canvasin new pop-up window if it' too large for the displayyou can scroll through its full size with the window' scroll bars figure - captures one image after its thumbnail is clickedand figure - shows the save as dialog issued when the key is pressed in the image windowbe sure to type the desired filename extension ( jpgin this save as dialogbecause pil uses it to know how to save the image to the file in generalany number of pyphoto thumbnail and image windows can be open at onceand each image can be saved independently beyond the screenshots already shownthis system' interaction is difficult to capture in static medium such as this book--you're better off test-driving the program live complete gui programs