Hopefully one learns something new every day. I know I did today, and that is how to use the image uploader and still have the images appear full-sized within my post. Want to know how? Well, assuming you don't already know, here it is.
When you are writing your post, above the window where you type there is an icon that looks like a paper clip. This is the image attachment button. Yes, you can scroll further down on the posting page to the "Attach Files" section and "Manage Attachments," but don't bother. Clicking on the paper clip button opens up the "Manage Attachments" window.
So, after you click on the paper clip button, as I said, you are presented with the "Manage Attachments" window. You can browse to up to five different images on your computer, selecting the images you want to upload. After they have been selected, you click on the "Upload" button. Wait while the images upload. When it is done it will display the name(s) of the image(s) in the "Current Attachments" window of the "Manage Attachments" window. Note that you can only upload a maximum of five images per post. Now, close the "Manage Attachments" window.
Back in your post, type what you want to type and position your cursor on the line where you want your image(s) to go. Now click on the paperclip again and a drop-down menu will appear with the names of the images that you uploaded. You can click on just one to insert it into your post, or you can select the "Insert All" at the bottom of that menu to put them all in your post. It will insert a code line(s) like this into your post - [ ATTACH]410718[/ATTACH]
That bit of code is your image, but you can see that it doesn't easily identify which one it is. Well, I guess you can't have everything.
You can cut and paste that code on different lines, if you wish, or add blank lines between the code lines to give more space between your images. If you preview your post you should see your images full-size in your post. Once you are done, submit your new thread and you should be good to go.
By the way, if you attach an image but don't use the method above to display the image in-line, the image will still show up at the bottom of your post as either a thumbnail (if the system is working correctly) or as a link to the full-sized image. If you attached an image and then decide that you do not want it to appear in your post in any manner, while writing your post, scroll down to the "Attach Files" menu and click on "Manage Attachments." Click on the "Remove" button next to the image you want to remove, and presto! - it's gone. Close the window and finish up your post. You can also do this when editing a post, within the usual time limit for editing.