I'm Sumit Bansal, your instructor for this Excel Training. I are actually training folks in essential/Innovative Excel and dashboards for much more than a decade now. In this particular online video of the Free of charge Excel training, I will show you how you can lock cells or defend worksheets https://sites.google.com/view/quickbooksonlinetraining/ultimate-guide-to-adobe-captivate-training-with-customguide