Renaming Google Sheets columns

Titles with a green background: you're not allowed to rename these titles. They're used for synchronisation with FLATRIS.

Titles with orange background: you are allowed to rename these titles.They're used in Google Sheets only.

 

Any coulumns can be hidden in order to avoid distractions while editing. To do so click with the right mouse button on title of the column and choose "Hide column".