How to Modify Columns in Google Docs
If you have a document that is pretty text-heavy, like a newsletter or magazine, you can format it in columns to make it a little easier to read. When using columns, you can also control where a new column begins using column breaks.
Select More options to manually configure your column layout from the Columns dialog box.
The Column options dialog box opens, with some extra column formatting options.
Inserting a column break ends the current column, moving the text cursor and any text after it to the top of the next column.
The column break is inserted, and the cursor moves to the beginning of the next column.