How do I change a doc to the one-column style

I was working in Writer and I set my text in two columns using Format > Columns, and after quitting the doc and reopening it the program started considering the two columns pages, so I cannot return to the one-column style because the ‘one column’ option is unavailable in Format > Columns, and the ‘two columns’ option divides each column in two, making it four of them. How can I return it to the normal way?

UPD: LibreOffice Writer v5.3.3.2 x64 for Win10. The whole document is two-columned

Aaand omg it worked! Thanks a lot @ajlittoz, seems like I’m still too new to LO, I would never think about duplicated sections in different menus.

The “anomaly” is rather Format>Columns because this is a property of page style or section definition. The “direct” menu item should be considered as a shortcut to page style property.

Since your problem is solved, please accept the answer and close the question. If you appreciate the answer, don’t hesitate to upvote it (you’ll be able to do it after accepting and closing, your reputation being increased).

Works here. But I may have a different LO version. Which is yours? which OS?

In case you can’t do it through Format>Columns, try to do it through Format>Page, Columns tab.

If it still does not work, how’s your document structured? Does it contain 1-column and 2-column fragments? Have you inserted sections?

(Edit your question to give more information, do not creta an answer for that)