Mohamed, thank you for the link to the CSS tutorial.
I figured it out.
For Others:
Display>Content Modules
1. If you have few options click on one by one and change the Title to something like Product list 1.
2. Set Yes to show title
3. Refresh your page until you find the right Component
4. Go into the component
5. Select Type of Layout "Div"
6. Change Image width and Image height. Note that even if you choose type of Layout other than Div. If you have already put some dimension settings in parameters for DIV, they will still impact your image size. To go back to original thumbnail size identified in configuration you have to leave the Image width and Image height in Parameters for DIV blank. I am not sure if it a bug by Div Image size overrides configuration image settings even when Type of Layout is not "Div"
Note that Div setting impacts images for Type of Content "Product" or "Category". I have not tested "band" as I am not using this option.
Sincerely, Yevgeny