What is Main Image?
Some posting types have one major or identifying image for the post.
Rules
One image is worth more than 1000 words.
Use your own or have copyright.
Acceptable formats are: PNG and JPG.
You do not need to scale image before uploading – it will happen automatically.
How?
Click on input field or on [Browse].
It opens up file selection dialog window, choose your file.
Click [Upload].