Hi all- How do I unhide hidden data markers on a series, once I have hidden them? Thank you.

Let me clarify: it's a scatterplot, and i've hidden the data markers but not the labels. I now wish to reveal the data markers but the data points don't appear when I hover my pointer over where they should be. My workaround has been to delete the series from the source data and re-enter it, but I have many series and this will be labor intensive. Thank you.