Creativix theme pics are not centered

Hello!

Like other folks…I am new to this too. I am using the Creativix theme and have uploaded pics into my site. The pics and text are fine and appear how I want them to within each post/category when viewed. However, they are uncentered within the “small boxes” below the “bigger” individual pics onn the slide, causing some faces to be cut off. Does anyone know how I can fix this? Is there something in the Dashboard where I can adjust the pics so that they can appear centered in the slide without having to decrease the size of the pic that is in the post? Is there a Plug-in that can help?

Any guidance will be deeply appreciated! Thanks in advance!