I'm using LibreOffice 3.5.7.2 on Ubuntu 12.04.5. I just opened a spreadsheet and it appears to have spellchecking enabled (i.e. there is red underlining on some text). I want to turn spellchecking off but when I go to the Tools menu, the first item 'Spell check...' is greyed out. I can't see anything relevant in Help. Any ideas? Cheers, Dave