Posting Images in xenForo:
The new forum offers several options for posting images. Some methods are similar to the old forum (vBulletin) but there are some new options that makes it easier.
Posting an image that is on your computer:
Posting an image that you have saved on your computer will use the ATTACH tag. There is an Insert Image (CTL+P) button on the post toolbar that will make attaching an image to your post easier.

The attachment popup window will open. On the left side, there's an upload option. From there you can either drag-drop the image onto the window or if you click on the "Drop Image (Or click here)" box, it will open a browse window where you can select the image from your computer to attach.

Posting an image that is on the internet:
Select the Insert Image icon on the toolbar:

When the popup opens, select the link icon on the right side. Paste the URL in the bo under http:// and click the insert button:

Copy/Paste an Image from Your Clipboard:
If you have the image copied into your clipboard, you can also use copy/paste to insert it into your post by copying the image into your clipboard, then clicking into the post and then selecting "paste".
Posting an image from a Personal Album (formerly known as "galleries" in vB):
Important Note: in order to share your images in the Album with others and to use it in a post, the Album must be a public album.

If you have an image in your a personal Album that you want to share in a post, you can access the image from the Media toolbar on the top of the screen:

Once you navigate to the image in your album, you can either right click or use the link icon to copy the image URL to your clipboard

Remote Hosting Image Sites:
We recommend that you upload your image to JUB - either as a post attachment or into your Album. This stores a permanent copy of the image on JUB which will remain even if the remote image is deleted off the remote site (e.g. Tumblr, Twitter).