>> Is there a way to copy the whole post including the pictures to that other area?
There were some changes in the "Idea" editing system a few months ago, and I haven't started a new "idea" or "tip" or "article" from scratch lately.
But, in general, I'd suggest opening two tabs in your browser, or starting two instances of your browser, so you can have the forum post open in one tab, and your new "article" open in the other tab. You don't have to, but it seems easier for me to do it that way.
Then "edit" your current post. Copy all of that text, with the "lightbox" codes, into your clipboard (CTRL C). Exit the post without really editing it. Switch over to your new article. Paste (CTRL V) into the body of the article. save that, and then "preview" so you can see how it worked.
If that doesn't work, let me know, and I'll try some experiments with "the new way" of creating articles and get back to you.
