Dear Nithiwadee --
You're welcome. Now...
Go to the "Images" page...
Click on an image...
On the right side scroll down until you find the category called "Embed" and click on the URL in the associated box. It should then be highlighted. Copy the link with keyboard shortcut, "Ctrl + C"... (or it may let you right-click on the link and click, "Copy" from the drop-down menu).
Go to your discussion thread and paste with the keyboard shortcut, "Ctrl + V"... (or it may allow you to right-click on the discussion thread and then click "Paste" from the drop-down menu).
Note:
(Your post on the discussion thread may be edited up to the first 24 hours only)
(You may also use this procedure to paste an image to your FAA blog).
Advanced editing:
After posting an image link in the discussion thread, you may look for the "width" and "height" parameters and change them if desired but you will want to keep the same ratio so that the image stays proportionate.
You can also edit the portion of the link that says 'alt='Art Prints'....... edit the text between the apostrophes that says, 'Art Prints' only. You will find it in two places. You can type something there that's more appropriate such as the title of your image and your name. This may allow it to be found easier with tag or word searches by collectors.