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Double-click the document you want to convert into a JPEG. This will open the document in Microsoft Word. It's an option in the top-left corner of your Mac's screen. This option is near the top of the drop-down File menu. You'll see this box toward the middle of the "Save As" window. A drop-down menu will appear. It's near the middle of the drop-down menu. While a DOC (Word) file isn't directly convertible to a JPEG file, a PDF is. It's a blue button in the bottom-right corner of the window. Your file has now been saved as a PDF; you'll likely find it on the desktop. To be able to save the PDF as a JPEG, you need to use the Preview application on the Mac because not all third-party PDF applications have this feature. To do this:  Click once the PDF file. Click File at the top of the screen. Select Open With in the drop-down menu. Click Preview. This option is in the top-left corner of the screen. A drop-down menu will appear. It's toward the middle of the drop-down menu. This box is near the bottom of the "Export" page. Doing so will allow you to save the PDF version of your Word document as a JPEG file. You'll see a slider appear below the Format box; clicking and dragging it right will increase your JPEG's quality, while dragging it left will decrease the quality. This is helpful if you need to lower the image's size (wherein you would lower the quality). It's in the bottom-right corner of the screen. Your Word document is now preserved in JPEG format.
Open the Word document. Click File. Click Save As. Click the "Format" drop-down box. Click PDF. Click Save. Open the PDF file with Preview. Click File. Click Export. Click Format. Click JPEG. Click Save.