To merge cells in a Microsoft Word table:
Select the cells you want to merge. You can select multiple cells by clicking and dragging the mouse pointer over them.
Right-click on the selected cells and click on "Merge Cells" from the context menu. Alternatively, you can click on the "Layout" tab under "Table Tools" in the Ribbon, and click on the "Merge Cells" button.
The selected cells will be merged into a single cell, combining the content from all the merged cells.
To split a merged cell back into individual cells:
Select the merged cell that you want to split.
Right-click on the merged cell and click on "Split Cells" from the context menu. Alternatively, you can click on the "Layout" tab under "Table Tools" in the Ribbon, and click on the "Split Cells" button.
In the "Split Cells" dialog box, specify the number of columns and rows you want to split the cell into. You can also choose to merge any previously merged cells within the selection. Click "OK" when you are done.
The selected merged cell will be split into multiple individual cells according to the specified number of columns and rows.