Do you have an alternate font for Arialuni.tff? Thanks
LibreOffice is a Unicode based applications, so all the fonts are Unicode. Arial is available with LibreOffice and can be selected directly, it is not called Arialuni.ttf. On my system there are five arialxxx.ttf fonts. I assume that you are using Windows and your system may not be set up to use Unicode characters directly. Which particular Unicode characters / languages do you wish to access? There are over 128,000 Unicode characters. As you can imagine few fonts will contain them all as they would be enormous and inefficient. However, on my LibO system all the characters are available spread over a number of fonts.
Arialuni.ttf is normally the same as Arial, but given a different name. In LibreOffice all fonts are Unicode fonts by definition. Which characters do you need that you are missing?
I think I provided an overcomplicated answer above. In your case just choose Arial.
I hope this gets you started… Peter
Thanks Peter. Yes I’m using Windows 7 and Libre Office 5 but I can only see Arial and Arial Black on my Writer drop down. I need Arial Unicode MS
See https://forums.adobe.com/thread/321160 - “Arial vs Arial Unicode”. The difference seems to be largely that the Arial Unicode includes sets of characters for East Asian languages, like Chinese. It’s a 24 MB sized file, that you only need when you want to work with Eastern Asiatic languages.
Perhaps you need the font with MS office. LibreOffice on my Linux-Mint system has a choice of fonts depending on the language chosen and no need for an Arialuni whose shape will be optimised for the Latin alphabet. @Rosalie has not said which languages she needs the characters for, or perhaps it was just a general enquiry.