It seems I have lost some of the cells of my spreadsheet, rather than do it manually it would make sense to write a simple script. A regular Python coder should be able to write it in a few minutes, no doubt it would take me a lot longer. I have two files with almost identical data, every row is the same. I want to read two columns from file A and put them in the same columns of file B if the cell in file B is empty only. If the cell is already occupied then leave it as it is. It would be nice to highlight or comment all the cells that have been changed in file B so we can clearly see changes made.