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How can we draw a semi circle or half a circle in Photoshop CS3? WE can draw a complete circle by using the shape method or tool. If we want to crop the image to get a semi circle or half a circle, When we crop an image usually the image is cropped and resized in the background of the layer to form the whole layer. If we want to create a half circle, what will be the procedure. I am using Adobe Photoshop CS3.

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    You can use the direct selection tool to mark an anchor point on a circle shape and then delete it thus making a half circle. – Mikael Carlsson Dec 12 '18 at 13:07
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Lazy method:

  • Draw the circle with the Ellipse tool
  • With the Direct Selection tool (A, the white arrow) select one of the anchors and delete.

Works great if all you want is a simple quick semicircle filled with color.

Drawback: it might cause trouble if you try to use stroke or other path operations (because it's an open shape). In which case I'd do it as Danielillo's answer.

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    Or you could close the shape after, or make it a Custom Shape for that matter. – Ryan Dec 12 '18 at 16:45
  • I tried but when I deleted one of the anchor points, the shape changed but not semi circle. I was not able to get the semi - circle by deleting anchor points. – Pushkal Singh Dec 13 '18 at 14:06
  • @PushkalSingh the shape changed to what? You have to use the Direct Selection tool, not the Path tool (shortcut P) otherwise you don't get the correct result. – Luciano Dec 13 '18 at 14:09
  • Thanks. I was able to change the shape to semi-circle using the shortcut P. It worked to create the semi-circle. – Pushkal Singh Dec 13 '18 at 14:13
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  • Draw a circle using the Ellipse Tool + Shift
  • Press Alt and use the Rectangle Tool to start drawing a rectangle shape from outside the circle until the center. Release Alt to make the rectangle from one corner to the next.

When drawing a shape on top of another, the Alt key subtract

enter image description here

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    You don't need to hold the Alt key beyond pressing it and the mouse button at the same time. – Ryan Dec 12 '18 at 14:52
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    Using the same method with the marquee tools will produce a semicircle selection – Luciano Dec 13 '18 at 14:11

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