thanks for your prompt answer. I am actually interested in both of the situations you propose: replacing and deleting. It is not unusal to have to remove or replace a citation with another. For example if you cite multiple citations at different places and that you want to remove only one after you have change your mind. Since I use Cite while you write, it happens a lot that I change my mind about the cited reference as I write and the references may already be included in several places in the manuscript (I am a life science researcher) . Thanks for your help again.