Download the Image Markup Tool. The current version is 1.8.2.2, dated June 13, 2012. Download the Image Markup Tool installer (setup_imt_1822.exe) for installing the tool in Windows. The installer also gives you the option to install source code if you wish. The Loupe tool is useful if you want to zoom in on certain areas in an image or document for the purposes of clarity or to bring attention to something in particular. Markup is Apple's extension for adding text, callouts, shapes, and more to images and documents and, with macOS Sierra, it's now built right into Photos for Mac. That means you can quickly take a snap shot, add an arrow, circle an area of interest, drop in some text, and then send it to a friend, co.
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 color, you can also remove the background.
Extract an image
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 .
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.
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.
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'll need to extract the PDF page as an image before you can use the image markup tools.
In the Preview app on your Mac, open the PDF file, choose View > Thumbnails, then select the page in the thumbnail sidebar.
Click File > Export, type a name, add a tag (optional), then choose where you want to save it.
Click the Format pop-up menu and choose an image format (such as PNG).
Click Save.
Remove the background from an image
In the Preview app on your Mac, if the Markup toolbar isn't showing, click the Show Markup Toolbar button , then click the Instant Alpha button (or use the Touch Bar).
Drag over part of the background.
Preview selects the area you dragged over and any pixels adjacent to it that have the same colors.
To delete the selected area, press Delete.
To delete everything outside the selected area, choose Edit > Invert Selection, then press Delete.
Repeat steps 2 and 3 until you have the image you want.
Image Markup Tool
