How to break out of two-column format (for appendix)

[johncambefort]

Hello,

I'm new to LaTex and was not sure where else to ask for help about this, my apologies if there is a better location for this question.

I am using the LaTex template and have a few pictures I want to include in my article's Appendix. How can I 'break out of' the two-column format for these pictures, to have each picture display alone prominently in the center of a page? I do not want the pictures to be shown inside of the columns, as they are then too small.
Thank you!