3D Santos, I'm gonna quickly explain to you how to post screenshots in a better manner than quad-posting, as the BLF gets really mad for some reason when someone quad posts.
Here's a quick guide on how to post screenshots without using the attachment system, meaning you can post tons of screenshots and have them appear in your post.
1. Upload your screenshots to a image hosting website, like
imgur.com,
photobucket.com, or puush. I think dropbox works for photos too.
2. Get the URL of your screenshots. If you're using imgur or photobucket, you can copy the "BBCode" of the image right on the website and paste it into your post. It should look like this on imgur:

(You can use either the linked or the regular one, I highlighted both for you)
[img]imgur.com/random numbers here[/img]
Or you can right click on your uploaded image, and click Copy Image URL or something like that (Copy Image if you're using Microsoft Edge). On your post, click the icon that looks like this:

, it should add the img tags for you. Just paste the url of your screenshot inbetween the image tags.
Just remember only 1 url/image per img tag.