ContentsIntroductionCrop Image ToolMask ToolGenerating Own MaskReferenceRelated Posts Introduction A image can be cropped using vector mask, or crop image tool. These can be found in Properties Panel (Window Properties) as shown in below figure. Both of these panels are context sensitive, so select the image with Selection Tool for.

Preview User Guide

You can extract part of an image. For example, you can extract one person’s face from a group photo and then paste the face elsewhere.

If an image’s background consists of areas that are mainly the same colour, you can also remove the background.

Extract an image

1. In the Preview app on your Mac, if the Markup toolbar isn’t showing, click the Show Markup Toolbar button , click the Selection Tools menu , then select the Smart Lasso tool .

2. Trace the edge of the image you want to extract.

   Make sure the image’s edge is within the thick border that appears as you trace.

3. Connect the end of the border back to its beginning, or stop dragging to connect the border in a straight line back to the beginning.

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4. Do one of the following:

   • To copy the image so that you can paste it in a document, choose Edit > Copy.

   • To remove everything outside of your selection, click Crop or choose Edit > Invert Selection, then press Delete.

Extract a PDF page as an image

You can select part of an image opened in Preview, then copy and paste it elsewhere or crop the content surrounding it. If the image is in a PDF, you need to extract the PDF page as an image before you can use the image markup tools.

1. In the Preview app on your Mac, open the PDF file, choose View > Thumbnails, then select the page in the thumbnail sidebar.

2. Click File > Export, type a name, add a tag (optional), then choose where you want to save it.

3. Click the Format pop-up menu and choose an image format (such as PNG).

4. Click Save.

Remove the background from an image

1. In the Preview app on your Mac, if the Markup toolbar isn’t showing, click the Show Markup Toolbar button , Mallemala productions jaber dasthu show chances. then click the Instant Alpha button (or use the Touch Bar).

2. Drag over part of the background.

   Preview selects the area you dragged over and any pixels adjacent to it that have the same colours.

3. To delete the selected area, press Delete.

   To delete everything outside the selected area, choose Edit > Invert Selection, then press Delete.

4. Repeat steps 2 and 3 until you have the image you want.

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The crop feature in Adobe Photoshop removes part of your image, reducing the picture to a selected section. The crop tool always selects a rectangular shape but you may sometimes want to crop an image to an irregular shape. For example, you may want to crop a larger image to leave only your company logo, which likely does not form an exact rectangle. Though you cannot crop to this irregular shape using the crop tool, you can do so by selecting and deleting the image's unwanted sections.

Double-click the icon of a lock beside your image layer if one appears there. Click 'OK' to unlock the layer.

Right-click the 'lasso' icon in the toolbox and then click 'Polygonal lasso tool' to change your mouse pointer to a small, irregular shape.

Click one point on the outline of the shape to which you want to crop. Click a second point and then a third, and keep clicking points until you have exactly outlined the shape.

Double-click to select the shape with the outline.

Press 'Shift-F7' to select the inverse of the shape, selecting all of the image other than the shape.

Press 'Backspace' to render the selected area transparent, cropping the image to the irregular shape.

Tip

• If your shape contains curves, use the regular lasso tool rather than the polygonal lasso and outline the entire shape manually.

About the Author

Ryan Menezes is a professional writer and blogger. He has a Bachelor of Science in journalism from Boston University and has written for the American Civil Liberties Union, the marketing firm InSegment and the project management service Assembla. He is also a member of Mensa and the American Parliamentary Debate Association.

Photo Credits

• Ablestock.com/AbleStock.com/Getty Images

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