Question

Which feature is used to apply predesigned formats to the existing table ?

Answer 1

Since you have not given the feature you are looking for, I've given a generalised answer.

There are various features. You have Excel Sheet where you can do anything with regard to formatting. 

For example: If you want to do addition, you just have to select all the rows and click on the sum up “å”.  This is the very basic thing. You can format the cells by just selecting the cell applying predesigned formats, like the colour, the font, bars etc.