I have a spreadsheet with three columns but want to ad another three
Or use the “insert column” button located by default in the Standard toolbar. Or read the manual.
If sheet is unlocked. Right click at to on letter of column, insert right or left. Odd, only 3 columns? Shift+Ctrl+Y to repeat (any) last step, to quickly enter 2 more columns.
Thank you both for your help, now all is sorted.
Someone keeps upvoting these types of “answers” today. @alandeunice: This should not be an answer, but rather a comment under a question. Then please mark one of the answers as accepted. See guidelines for asking.