I post images like this:
- Put your subject into Google.
- Choose the Images option which will display all relevant images to your search.
- Click on one of the image thumbnails.
- Avoid copyright images such as those from Shutterstock.
- A larger version will open on the right of your screen.
- Right click on the larger image and select Copy Image Link.
- Use the Black 'New Reply' button.
- Paste this into your post by selecting Insert an Image icon in the tool bar above.
- Choose Insert and a preview will will result.
- If you're satisfied with it choose Post Reply.