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When you take a screenshot, a small thumbnail will appear in the bottom left corner of your screen. This feature makes it easy to quickly draw onto a screenshot before saving or sharing it.
Simply tap the thumbnail, and then use the pen tools to draw on the image. At the bottom, you can choose between a pen, and a highlighter.
You can adjust the darkness and thickness of each of these implements by tapping the individual tools, and the color by tapping the colored circles to the right.
To the right of the pens you have an eraser, which can rub out your pen work. Next to this you have a lasso tool. Draw around your markings with this, and you can touch and drag the selected area to another part of the screenshot.
Finally you have the ruler. Select this and orient it with two fingers, and you’ll be able to draw perfectly straight lines with the pen tools. Just like real life!
At the top of the screen you can find Done, Undo, and Redo buttons, a Trash button, and also a Share icon. You can save your screenshot by tapping Done or by using the Share icon.