Type in a message or note here, have a picture on your computer ready for viewing. One can only load 3 at a time. Use the "Upload attachment" tab below; The choose file tab will open up. Find your picture on your computer and click on it.
Then click on the tab add the file. You can then place them in line where you want the picture or it will just put them here.
If you have the pictures on another server you need to put the address link for the picture here. Use the Img tab at the top of the new post to upload the link; ie.
Here is a sample of that.

Because it is not on this server the size doesn't matter it can be accessed via its own address.
Thanks