Resize Image Mac Mail. If you want to crop out a part of the image to resize see cropping an image in preview. The image should open by default in preview.
All the images will open in preview. How to resize an image in the preview app first open finder on your mac. Right click and choose open with preview.
To search for an image name or tag open finder then click the magnifying glass icon in the menu bar.
Type in your search criteria and press return to show your results step 2 drag the image to the preview icon in the dock or finder. Step 1 navigate to the image you wish to resize. Select all the images inside preview shortcut. In the folder with your images select the ones you need to resize and then right click on them and choose open with.