On the menu above the posts, there are buttons.
In the 5th set the first button says "Host an Image".
1. Click on the button that says "Host an Image"
2. Choose whether u are providing an url for ur image OR uploading from your computer.
**If u are uploading from your computer click on "Choose File"
Find the image you want from your computer.
3. Click on "Host it" located at the bottom
4. You are now given links, look at the last one that says "Image URL"
5. Copy the link thats given in "Image URL"
6. GO back to the menu and hit the key next to "Host an Image" Which is called, "Image"
7. Paste the link that you were given before
8. Hit ok