I used to use ctl-m to clear direct formatting of a cell but this key closes the document.
Has the key combination changed?
Version: 6.4.3.2
Build ID: 1:6.4.3-0ubuntu0.20.04.1
CPU threads: 12; OS: Linux 5.4; UI render: default; VCL: qt5;
Locale: en-CA (en_CA.UTF-8); UI-Language: en-US
Calc: threaded