Definition:
In word, writing the paragraphs side by side is said to multiple column format. After completing first paragraph in one column then go to second column and so on. This way of writing is known to be multiple column format.
How to add multiple columns in word?
Go to Page Layout Ribbon there you will find columns command in Page Setup toolbar as shown below
Select the text you want to format
Figure: Knowing about columns command
Select the text you want to format
Figure: Selecting Text
Then now click on columns command and select option from drop down list which, how many columns you want to create.
Now you will get the window like...
Figure: Selecting number of columns
To add or remove columns...
Figure: Add or Remove columns
Now you will get the window like...
Figure: Multiple presets of columns
Notes: