I am always attaching the files the same way. I believe if it's a jpeg extension, it will show as an image in the message and if it is a pdf, it will be an attachment? Other forums, and I like that a lot, let you just copy and paste a screenshot into your message which makes it really easy and fast.
Correct me if I am wrong.
PDF's and other files do not show up in the messages. Pictures do.
We do not have that copy and paste functionality (also known as "Drag and Drop", and we never will) but uploading a screenshot is just as fast. And we have facilities for changing the rotation afterwards. See
https://www.sl113.org/forums/index.php?topic=31410.0The sites that offer "Drag and Drop" that we are all getting used to (Facebook, Instagram) have a completely different target audience than we do. They are "image centric", i.e. you post one or a number of images, and limited text. Forum software is "content centric", i.e. you post content (formatted in different ways) and use pictures to explain. As an example: try and find a post on Facebook which you saw 3 months ago... Good luck!
So I know of no forum software that supports Drag and Drop in a similar manner, because ultimately you need to tell the forum where to display your picture. So the Drag and Drop just replaces your "Upload" button, pictures are still attachments.
When we started this site, many people were still using slower Internet connections and we had a smaller server budget. Therefore we limited the number of attachments to a post to 4, and limited the size. We still limit the size (to a normal size on a modern screen) but that is because I hate horizontal scrolling in a forum. And the detail is still pretty visible.
You can actually create an in-line picture (hosted elsewhere) using the "Insert Image" BB-Code button. But I discourage it. Many image hosting services went bust, stopped operating or started charging money. ImageBucket, anyone? So look at some of the older posts, and you'll see dead links.
If you want full control over pictures and content... put it on the
Technical Manual. Pictures uploaded there, or here as an Attachment, are on our own server and do not disappear. Hence you can still find old and useful content here...
Peter