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Hi Vincent,

On Thu, Aug 20, 2020 at 01:19:10PM +0200, Vincent Douce Mathoscope wrote:
> i made these trys :
> (i run mac os X 10.14.6)
> i exported this tm file to this pdf 
> 
> under GoogleChrome, Opera, Vivaldi, Brave i dont' see the "-" even if i 
> zoom at the max that each app gives
> under Safari, Firefox, Aperçu, Adobe Acrobat Pro, i see the "-" without 
> needing to zoom

Thanks for the info.  At any rate it is useful to know which viewers we can 
recommend.

> well i dont often use a browser to open pdfs, but some (and not a minority) 
> of my student do
> i must find a solution so that they see my "-" otherwise i have to send 
> them my works either using screenhosts, either under .tm format which can 
> be hard if for example they read my docs from a smartphone
> what i have not tried is maybe changing the fonts (maybe with Styx it could 
> work better ?)

It is definitely the case that the minus sign is very thin for
the default (Computer Modern Roman) font, so some viewers may
very well round the width to zero.  I guess that the TeX Gyre fonts
and the Stix font will all be better from this point of view.

I personally tend to use TeX Gyre Pagella nowadays.

Best wishes, --Joris