This tutorial shows how to organize an album on Google Photos and download images from Google Photos and how open them in Photopea and then shows how to get edited images uploaded to Google Photos for a grade:
Basic Editing Photopea
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Here is a PDF of this tutorial:
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Taking Screen Shot of Image Open in Photopea
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Saving Files with Photopea
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Saving Files as TIFF with Photopea
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Digital Hand Painting – Photopea
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Overlay to Enhance Contrast
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Mask Use to Fix Underexposure
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Photomontage
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Mask Use to Fix Merger
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Touch up Damaged Image