Excel allows you to protect the contents of specific cells in a worksheet. In doing so, you can choose whether users are allowed to select or edit a cell or range of cells, insert or delete rows or columns, alter formatting, and sort and filter, among other options.xcel allows you to protect the contents of specific cells in a worksheet. In doing so, you can choose whether users are allowed to select or edit a cell or range of cells, insert or delete rows or columns, alter formatting, and sort and filter, among other options.
When your friend has seen your message, the word Seen appears below the message. Messages are marked as seen when the person you sent them to is actively chatting or checking their messages. This feature is part of every message you send, whether it's from your phone or a computer.
Sometimes, though, you will not see a Message button. That is because Facebook lets users block others from writing to them without first becoming Facebook friends.To block others from messaging you, click the arrow button at the very top and right of Facebookâs Web interface.hat is because Facebook lets users block others from writing to them without first becoming Facebook friends. To block others from messaging you, click the arrow button at the very top and right of Facebookâs Web interface.