Yes, you can merge cells vertically in Excel using the "Merge & Center" option. Here are the steps to do so:

1. Select the group of cells that you want to merge vertically.
2. Right-click on the selected cells and choose "Format Cells" from the drop-down menu.
3. In the "Alignment" tab, select "Center" under the "Vertical" section.
4. Click on the "Merge & Center" button located in the "Alignment" tab.
5. The selected cells will now be merged vertically.

Alternatively, you can use a keyboard shortcut to merge cells vertically. Here's how:

1. Select the group of cells that you want to merge vertically.
2. Press and hold the "Alt" key on your keyboard.
3. While holding the "Alt" key, press "H", then "M", then "V".
4. Release the "Alt" key.
5. The selected cells will now be merged vertically.