I wonder if you can help me. I recently got a new computer and Excel software (Mac). I am having trouble navigating my large excel file that I use for book keeping and I am especially having trouble with the copy and paste keyboard shortcuts. The reason I find this strange is because the shortcuts seem to work in other applications and also on other excel files. This makes me think that perhaps my file is corrupted in some way. I do not think this is too difficult for your kind of expertise but I am flumoxed.