You can sum cells across multiple sheets in Excel. This article presents steps for Adding single-cell values or Adding values in the range of cells.

It may be needed that you want to type multiple lines of text a particular cell. The main concern lies in the fact that under Excel when you press the Enter Key, the cursor will move to the next cell.

If you cannot insert, add or create new cells in worksheets in Microsoft Excel, remove cell protection and unmerge the Rows to begin with.