Active cell not bordered.

I have two very similar spreadsheets 1. to keep my household information 2. to keep my sister’s household information.
Each spreadsheet has a number of pages the first page on each being called “Index” which I use to cross reference information from other pages within the spreadsheet.
Problem
On my own spreadsheet within the Index page if I click on a cell the row and column numbers are highlighted and there is a border around the active cell, on my sister’s spreadsheet whilst the row and column numbers are highlighted there is no border around the active cell making it difficult to ‘see where you are’
Any help would be appreciated

There are many possibilities:

Working with LibreOffice 6.4.7.2 (x86); OS: Windows 6.1.


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