Split cells are used to reformat tables quickly without shifting other cells over. When you split a cell horizontally, the cell divides from side to side, creating an additional row within the cell. When you split it vertically, it divides from top to bottom, creating an additional column within the cell. Splitting a cell diagonally splits it from one corner to another. Although there's not an option to split cells diagonally in the Layout tab in Word or PowerPoint, you can use other tools to divide the cell.
Microsoft Word
Step
Click anywhere within the table to make the "Design" tab visible in Microsoft Word.
Step
Click the "Design" tab under "Table Tools."
Step
Go to the "Draw Borders" group and select "Draw Table."
Video of the Day
Step
Place your cursor at the top corner of the cell you want to split.
Step
Click, hold and drag your mouse from the top, right corner of the cell to the opposite corner to split it diagonally.
Step
Click the "Draw Table" button to deactivate the "Draw Table" option.
Microsoft Excel or PowerPoint
Step
Click the "Insert" tab in Microsoft Excel.
Step
Go to the "Illustrations" group and click "Shapes" to expand its options.
Step
Select the "Line" option from the "Lines" section.
Step
Place your cursor on the top, left corner of the cell you want to split.
Step
Click, hold and drag your mouse towards the opposite corner to split the cell diagonally.
