App allows you to work with up to 4 shapes simultaneously: black, green, red and blue, you can open up to 16 independent image-editing windows.
Each image-editing window is created by app any time you clone the selection. Such a window has button on the upper-left corner to save your work you have done in this window. Each image-editing window providing all the controls and functionalities available in the main window. You'll have access to the full range of colors and shapes within each window. In addition to the functionalities of the main window, each image-editing window offers dedicated controls specifically for image editing tasks like feathering selections and changing backgrounds.