How to save part of an image as a PNG file?

To save an image in .png format, you need to open the “Export b PNG” window. To do this, you need to: 1) select Export as PNG in the File menu: 2) in the Export as PNG window, click the “export as …” button and in the window that opens, select a folder to save the file and specify a name; 3) in the Export to PNG window, click the “export” button. You can select part of the image and only the selection will be saved to the PNG file.

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