Hi there!

The Group text that you see after the name of your document at the top of the page indicates that the workbook contains grouped sheets. Grouping sheets in Excel allows you to perform the same action on multiple sheets at once, such as formatting or entering data.

Regarding your issue with inserting symbols into your spreadsheet, it's possible that the sheets in your workbook are protected or that certain cells are locked.

To check if your sheets are protected,

1. go to the Review tab in the Excel ribbon
2. click on the "Unprotect Sheet" button.

If the button is grayed out, then your sheet is not protected.

If your sheet is protected, you will need to enter the password to unprotect it. If you don't know the password, you can try to contact the person who protected the sheet or try to use a password recovery tool.

If your sheet is not protected, then it's possible that the cells where you are trying to insert symbols are locked. To check if a cell is locked,

1. select the cell
2. go to the Home tab in the Excel ribbon
3. click on the "Format Cells" button
4. go to the "Protection" tab.

If the "Locked" checkbox is checked, then the cell is locked.

To unlock the cell, uncheck the "Locked" checkbox and click OK. If the cells are part of a protected sheet, you will need to unprotect the sheet first before you can unlock the cells.