I create powerpoint files using the R package Officer. I would like to make the files accessible by adding alt-text to each slide, and ideally to different parts of each slide. I know how to add alt-text using Rmarkdown when creating word documents, etc. but don't know if it is possible with Officer. I would like to use the Officer package because of the control it provides in placing content, etc.
Is it possible to add alt-text with Officer?