In power point presentation we use so much pictures. All the pictured need to be cited. But if we use some pictures for decoration of slide, then is the picture need to be cited?
And if yes then which extra quote need to be add in bibliography?
A PowerPoint presentation is not a cited publication since it does not appear in a refereed journal, and usually it is designed for conference lectures or class instruction. It is possible to add the presentation as a supplementary material to a scientific article, and cite it as such.