You can now style individual cells in the Table chart. You can bold, use italics, underline, left align, center align, right align, create superscript, and create subscript.
To style cells in the table chart:
❶ Double-click the Table chart.
❷ In the data table select the cells you wish to edit and right click.
❸ In the contact menu, choose Text styling.
❹ Click on the available styling options or use the keyboard combinations.
- Bold: CMD+B (Mac) or CTRL+B (Windows)
- Italic: CMD+I (Mac) or CTRL+I (Windows)
- Underline: CMD+U (Mac) or CTRL+U (Windows)
- Left align: SHIFT+CMD+L (Mac) or SHIFT+CTRL+L (Windows)
- Center align: SHIFT+CMD+E (Mac) or SHIFT+CTRL+E (Windows)
- Right align: SHIFT+CMD+R (Mac) or SHIFT+CTRL+R (Windows)
- Superscript: CMD+"." (Mac) or CTRL+"." (Windows)
- Superscript: CMD+"," (Mac) or CTRL+"," (Windows)
Note: It will not be possible to style cells in the first column or row if you have enabled Merge first column or Merge first row options in the Table properties tab, in chart settings. 
You can also change the font used in the Table chart. Head over to the article on Editing fonts in charts and maps to see how to do so.
