Draw : Click the Shapes button, then click the Loupe button. Drag the loupe to the area you want to magnify. To increase or decrease the magnification, drag the green handle; drag the blue handle to change the loupe size. You can place multiple loupes on a photo to magnify specific areas.
Tip: To further magnify an area, create another loupe (press and hold the Option key while you drag an existing one), then position it over the other loupe, using the alignment guides to adjust its position.
Text : Highlight selected text.
Annotate .
Change the line color: Click the Border Color button Crop and straighten photos in Photos on Mac