How To Resize Image In Mac Mail Signature. All the images will. Navigate to the image you wish to resize.
Click the add button below the middle column. If you re using apple mail the dpi of the image should be 72 dpi. Now the selected signature is inserted into the message body.
Right click and choose open with preview.
Simply drag the image into the signature white space. This method will help you change the size of the entire image. Right click and choose open with preview. If you want to crop out a part of the image to resize see cropping an image in preview.