photoshop既問題

The panel on the left has a function called "mask", click it and click the brush button to paint the area you wish to be selected, noted: the area you painted will temporary become red, so don't be afraid. When you paint over all the area you need to select... press the button next to the mask mode to exit mask mode and now... you will notice that the area you painted has been surrounded by dotted line(s)... Press Ctrl + x to cut the image out.

係photoshop左邊的toolbar, 揀crop tool, 框住你想要既一部份, double click, save就ok