https://bugs.documentfoundation.org/show_bug.cgi?id=93030
--- Comment #15 from Chris Hodges <ch...@c-hodges.co.uk> --- OK I've found the necessary steps. It looks like the fix requires the additional user step of inserting a line break in the number formatting of the axis. Alternatively ticking "source format" and inserting the line break into the format for the source cells breaks the axis labels correctly, but in the source cells the line break is suppressed so the effect is 01/02/0304:05; inserting a space as well breaks the centre-alignment of the 2 lines on top of each other in the axis labels The only way to get the line break in was given by a superuser answer https://superuser.com/a/1581574/245275 and consists of copy-pasting a line break from a cell where it was entered using ctrl+enter - there seems to be no way to enter it in a custom formatting box though it displays nicely as ↵ (but copies as a carriage return). So IMO this needs explaining somewhere -- You are receiving this mail because: You are the assignee for the bug.