How To Resize Image In Mac Email Signature. In the left column select the email account where you want to use the signature. In the new message window please click insert signature and then select the signature whose image you will resize.
There is no known limit for the number of images in an office 365 email signature. Navigate to the image you wish to resize. Please do as follows.
How to create an image signature in mail for mac.
Click the add button below the middle column. You may need to resize your image or logo to an appropriate size for an email message using preview or another image editor. Click to add a new signature template. Select all the images you want to resize by clicking on each one in the finder or on your desktop while pressing the command key.