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.
If they are logged into Facebook and click on the link to your profile, then they will get an error message. Although they can't message your after you block them, you'll still be able to see past conversations unless you delete them.