You need just the highlighted address (
https://i.postimg.cc/7Y3SqqDn/DC9-E6-E9-D-4-A9-A-43-BD-A322-3211-EB831252.jpg) and put it between these two codes that are in brackets - [img]
code goes here [/img]
Right clicking on an image will open a box with several options, the one you want to left click on is 'copy image address' then you can paste that in the box that comes up for posting an image.
If you quote someone's post it will show the image codes and not the picture in the editor box, you must use the 'full editor' to get all the options.
I've been using this site image gallery when posting most pictures thinking that they will never go away as long as the site is active, unlike the ones I did through photobucket. Recently this site has started reducing the size of the pictures when uploaded which has reduced the quality a lot, they must be having issues with storage... so maybe the pictures won't be as permanent here as I thought if they start running out of space or find it costs to much to keep them. If they would allow a person to go back and delete their old pictures that were no longer needed it would help.