Created attachment 165687 [details] Image of an index showing a continuation line Version: 7.0.0.3 (x64) Build ID: 8061b3e9204bef6b321a21033174034a5e2ea88e CPU threads: 4; OS: Windows 10.0 Build 19041; UI render: Skia/Raster; VCL: win Locale: en-GB (en_GB); UI: en-GB Calc: threaded It is not uncommon in non-fiction books for an index entry or subentry to run from one page to the other. In this case the Oxford Guide to Style (OUP, 2005, 16.6.2 "Continuation") stipulates that the entry heading or subheading should be repeated at the top of the new page, followed by a space, then "(cont.)": especially when going from the bottom of a recto page to the top of a verso. You can find examples in almost any non-fiction book index: the attached image is from the index to the Oxford Guide to Style itself.
Cpuldn't find anything in Chicago manual of Style. 16.141 shows an example of an index, where the text just continues. LO doesn't follow a certain style guide (that would make some decisions easier)
as an enhancement, it makes sense, not sure whether it will ever be implemented though