Comment: -It is used to input the message in selected cells which display when the move mouse pointer in it.

Process: -

ü Select your cell

ü Click on review tab

ü Click on comment

ü Input the message

Protect sheet: -It is a part of protection which used to protect of active sheet. After using of this feature your sheet will make read only.

Process: -

ü Click on review tab

ü Click on protect sheet

ü Enter password and ok

ü Again enter password and click on ok

Protect workbook: -It is a part of protection also which provide to lock the worksheet, windows etc.

Process: -

ü Click on review tab

ü Click on protect workbook

ü Click protect structure and windows

ü Check windows option

ü Enter password and ok

Again enter password and click on ok