[Dropped] Make cell borders heavier

[DavidMWright]

I've been trying to make the cell borders heavier, but when I try to do this and save the change, it reverts back to the default setting every time.
What am I doing wrong?
I'm using NeoOffice 2017.33 on a MacBook Pro running OS10.12.6

[Hagar Delest]

Do you save in native ODF (.ods for spreadsheets)?
NeoOffice is rather old now. Don't you want to try with something newer (or even LibreOffice)?

[DavidMWright]

No, I use the old MS .xls. Since I'm still using Mac OS10.12.6 I can't use the current version of LibreOffice and haven't found where I can download old versions. I've tried using ODF but it's no different.

[Hagar Delest]

MS Office old format was reverse engineered, thus such glitch is to be expected, welcome to the vendor lock-in policy. If you really need to work in .xls, then stick to MS Office. But they have moved to OOXML anyway (.xlsx).
Strange that it would not stick in .odf. Can you attach a sample file (see: How to attach a document here)?

[MrProgrammer]

I've been trying to make the cell borders heavier, but when I … save …, it reverts back to the default.
I've tried using ODF but it's no different.

I am unable to reproduce your problem when using ODF and the Format → Cells → Borders dialog (OpenOffice 4.1.7 on MacOS 13.7.4).

202503270833.ods

(8.77 KiB) Downloaded 44 times

I'm using … OS10.12.6 [and] haven't found where I can download old versions [of LibreOffice].

Any recent version of OpenOffice should run on MacOS 10.12. Be sure to also read Q15/A15.
Mac FAQ: Q03/A03: How do I install OpenOffice on a Mac?
[Solved] User experience: OpenOffice 4.1.7 on MacOS 10.14.6