Using imgurPress the
Computer button:
Browse to the image file, then click on the
Start Upload button in the opened window:
When the upload is complete, a panel appears:
Select the desired image or thumbnail size at the bottom.
After that, copy one of the codes by clicking the
icon:
Linked BBCode (message boards) - clickable image,
BBCode (message boards & forums) - simple image.
Now just paste the code into your post.