> Alan Bowen <mailto:bowenalan03@gmail.com>
> 19. Oktober 2017 um 15:05
> Many thanks for this, Wolfgang. That is very helpful. Right now, then, 
> I have:
>
> \definefontfamily[mainface][rm][Brill]
> [protrusion=quality,
> expansion=quality,
> mode=node,
> force=yes,
> ]
> \definefallbackfamily [mainface] [rm] [Brill]
> [tf=style:italic, range={0x03B8}, offset={0x03D1}]%Greek theta
>
> \definefallbackfamily[mainface][mm][Brill]
> [range={0x30-0x39}] %oldstyle numerals, normal
>
> \definefallbackfamily [mainface] [mm] [Brill] 
> [preset=math:lowercasenormal]
> \definefallbackfamily [mainface] [mm] [BrillItalic] 
> [preset=math:lowercaseitalic]

The font name for the third argument is *always* Brill and not 
BrillItalic or BrillBold.

> \definefallbackfamily [mainface] [mm] [Brill] 
> [preset=math:uppercasenormal]
> \definefallbackfamily [mainface] [mm] [BrillItalic] 
> [preset=math:uppercaseitalic]
>
> \definefallbackfamily [mainface] [mm] [Brill] 
> [preset=math:lowercasegreeknormal]
> \definefallbackfamily [mainface] [mm] [BrillItalic] 
> [preset=math:lowercasegreekitalic]
> \definefallbackfamily [mainface] [mm] 
> [Brill][preset=math:uppercasegreeknormal]
> \definefallbackfamily [mainface] [mm] [BrillItalic] 
> [preset=math:uppercasegreekitalic]
>
> \definefontfamily[mainface][mm][TeX Gyre Termes Math][scale=0.94]
>
> \setupmathematics[ucgreek=normal, lcgreek=italic]
>
> \setupbodyfont[mainface,10pt]
>
>
> \starttext
>
> normal: 1234567890\quad math: \m{1234567890}
>
> normal: ABCDEFabcdef\quad italic: \emph{ABCDEFabcdef}\quad math: 
> \m{\red ABCDEFabcdef}
>
> normal: ΑΒΓΔΕΘαβγδεθ\quad slanted: \emph{ΑΒΓΔΕΘαβγδεθ}\quad math: 
> \m{\red ΑΒΓΔΕΘαβγδεθ}
>
> Greek theta: \emph{θ}
>
> \stoptext
>
> As you can see, all I need is to get the Brill lowercase Greek in 
> mathmode and the proper slanted Greek theta.

\starttext
\m{\theta \vartheta}
\stoptext

> I have tried this with Pagella and Cambria instead of the Brill font 
> and the problem persists. So I must be doing something wrong. But what?
>
Pagella and Cambria have a proper math font, why would you use fallbacks 
for them.

Wolfgang