How To Make Photo's Unclickable

I found this post made relating to WordPress Blog Posts:

When you insert an image into a post, in the panel where you click ‘Insert into post’, there is a ‘Link URL’. Click ‘None’ for that URL before you insert.

For the image size, it depends a little on your theme. You may be able to use this line at the end of your style.css:

img { max-width: 100%; }
You may possibly have to add a class to all your images and add that class to the statement above.

My problem is that I cannot find the None option. Maybe this feature does not exist on WordPress anymore. Basically there is a picture on my homepage. I mucked around with the media settings, and now it is clickable.

Can someone please tell me what to do to make it unclickable?

Thanks.