how to insert an image?

[king1]

use the attachment option from the new reply or full edit options for that (attachments are not available at quick edit or quick reply) which you can then add to the post.  The insert image is only for online images via a URL

But, how / where to enable 'full edit option?  
Have been searching around, no.... 
Hidden some where ...

From the New Reply or full edit option when editing a post