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From: Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Bold font in subscript
Date: Thu, 17 Nov 2022 10:16:06 +0000
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On 12/11/2022 03:26, Nakita wrote:
> Dear all,
> I want to make gnuplot to use "Bold" fonts by default, so I set the "termoption":
> set termoption font "Times New Roman:bold, 24"
> However, I recently noticed that this only applies to normal texts and subscipts with only one character, eg, "S_i". If I put more than one characters in subscrpts in curly braces, such as "A_{ij}", gnuplot will not render the "ij" in bold faces.
> The minimal test codes:
> 
> set termoption font "Times New Roman:bold, 24"
> set xlabel  "S_i"
> set ylabel "A_{ij}"
> p sin(x)
> 
> One can notice that the xlabel can render the subscript "i" in bold faces while the "ij" are not rendered in bold faces.
> So is this a gnuplot bug or I am missing something here?

Appears to be a bug.
Examining the .eps file in a text editor shows that ij is not in bold

Find "(ij)" in the file and edit the preceding

s/(Times-New-Roman)/(Times-New_Roman:bold)/

It is the only occurrence of "Roman)" in the file.

FWIW The first EPS rendering engine I tried to view it with didn't 
honour "Bold" at all (it has problems with Greek letters too) :(

-- 
Regards,
Martin Brown