You can combine two columns in Excel using several formulas and tools available in the software. If the columns that you want to combine are empty, you can use Excel's merge function.

See how to join two data sets by one or more common columns using base R’s merge function, dplyr join functions, and the speedy data.table package.

References Microsoft: Change the Column Width and Row Height Microsoft: Resize a Table, Column or Row Microsoft: Merge and Unmerge Cells Excel Easy: Autofit ...