How to combine two or more cells in the same row or column into a single cell
1. Select the cells that you want to merge.
2. Switch the toolbar on the Table tab to reveal more options.
3. Tap Merge Cells.
How to split a cell in to two or more cells
1. Place the cursor in a cell, or select multiple cells that you want to split.
2. On the Table tab, tap Split Cells.
3. Enter the number of columns or rows that you want to split the selected cells into and confirm with Apply.