...Each time you will run the above comment, new slide deck will be generated. In order to work on exactly the same deck, just get the ID of the already generated slides. md2googleslides does not edit or control any theme-related options. Just set a base theme you want on Google Slides directly. Even if you will use, append option for deck reuse, theme will be not changed. Images can be placed on slides using image tags. Multiple images can be included.