https://support.apple.com/en-mn/guide/keynote/tanf18a5b050/mac
In Keynote on Mac, merge the content of adjacent cells into a single cell, or separate merged cells into individual cells.
unmerge cellsmac applekeynotesupport
https://support.apple.com/en-mn/guide/pages-icloud/gilbb46366c8/icloud
In Pages for iCloud, merge the content of adjacent cells into a single cell, or separate merged cells into individual cells.
unmerge cellsapple supportpagesicloud
https://support.apple.com/en-om/guide/pages/taneef63d4fa/mac
In Pages on Mac, merge the content of adjacent cells into a single cell, or separate merged cells into individual cells.
mac applemergetablecellspages