1. Adding an image in Jira comment: There are two ways using which we can insert an image in Jira:
User can specify various attributes to the image such as height, width, horizontal space, Vertical space etc.
2. Adding an external link in Jira comment: An external URL can be added to Jira comment using below syntax:
If you want to insert an email address, use syntax:
This will result into: to give the better understanding that the link is an email address.