In most word applications, pressing Enter moves the cursor to the next line. This is not the case in the spreadsheet application Excel, which at times seems to have a mind of its own. When you press Enter in Microsoft Excel, it does not add a line break within a cell. Instead, it places the cursor in the cell below.
If you’re rather new to Excel, this can become a bit of an annoyance as you try to enter in data in your spreadsheet. The trick to this is that if you want to add a line break within a cell, press Alt + Enter instead of just Enter.