https://codepen.io/daphnied/pen/dWEmdx/
This is my portfolio. I have worked on it for hours. I am using Google, YouTube, and the FCC website for help. I cannot format my picture and I do not know how to add my projects in a thumbnail. Can someone point me to a site that can help? Thanks
You may find this website useful. Here’s a link about image manipulation using Bootstrap framework. (You have Bootstrap installed on your CodePen so it should work).
Thank you. That is the website I used to get to this point. I used their information to style my pictures but it isn’t working.
You are using the version 4 of Bootstrap.
(you can check it under Settings)
In v4 the equivalent of img-responsive has become:
.img-fluid
Alternatively you can simply give your image a
max-width: 100% and height: auto since at the end of the day that’s what BS CSS add for you 
To conclude I suggest you to use the v3.3.7 since is the one taught here on FCC and on many resources.
Here’s the link to enter:
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css
I’ll leave you the CDN resource in case you want to add the JS plugin as well for v3.3.7.
That is what I needed! Thank you.