1. Advanced Lesson 4: Advanced Collaboration To prevent users from inserting, deleting, and renaming worksheets, protect the workbook. When you protect a workbook, you prevent others from making changes to all or part of a workbook or worksheet. Adding protection to a worksheet will lock all cells by default. To allow changes to some cells and not others, unlock the cells that can be changed.

2. Advanced Lesson 4: Advanced Collaboration If a workbook contains sensitive material such as salaries or bank statements, you can set a password so no user can open the file without the password. Passwords are case sensitive, which means that if your password has uppercase, lowercase, or a combination of uppercase and lowercase letters, you must key it the same way every time.

3. Advanced Lesson 4: Advanced Collaboration You can set a password so that others can open, but not modify, the workbook. You might want to allow people to view some workbooks without being able to modify them. However, you might not want employees to make an alteration, or change, to the workbook.

4. Advanced Lesson 4: Advanced Collaboration In an office setting, many users may need to access and edit the same Excel workbook. For instance, a sales team may need to input and update their current sales in a master document. You can share the workbook so multiple users can have access to this file at the same time. Each person can add, edit, or delete information in the shared workbook from their own computer.

5. Advanced Lesson 4: Advanced Collaboration Use Track Changes to mark edits as you make them. Tracking changes allows other people to review the changes and comments that you have made. Tracking changes allows you to see the modifications that have been made to a worksheet, including inserted or deleted text, numbers, rows, and columns. Highlighted changes on-screen will exhibit a colored cell border with a small triangle inside the upper-left corner. When the pointer is positioned over a changed cell, a window appears containing the reviewer’s name, date, and the cell modification.

6. Advanced Lesson 4: Advanced Collaboration After the changes are made in a document, you can choose to accept a change and the cell’s content will reflect the update, or you can reject a change and the cell’s original value will be restored. You can also insert a comment to make a suggestion or ask questions about the data. Comments will exhibit a red triangle in the upper left-hand corner of a cell or range of cells.

7. Advanced Lesson 4: Advanced Collaboration When sharing workbooks or data with others, you may want to move or copy a worksheet to another workbook so that you can retain the original worksheet data.

8. Advanced Lesson 4: Advanced Collaboration Documents are often distributed to coworkers for comment and revision. After sharing a workbook with others there will be more than one version of the workbook. Merge, or combine, the workbook versions to create the final workbook. The workbooks that you combine must have been created from the same shared workbook.

9. Advanced Lesson 4: Advanced Collaboration Before you share a workbook with others, you can use the Mark as Final command to make the workbook read-only and prevent any further changes.

10. Advanced Lesson 4: Advanced Collaboration You can attach a digital signature to a workbook to identify yourself as the source, or origin, of the workbook. The recipient will know it is from you and that the file has not been tampered with.