>> May be ConTeXt experts would have better suggestions, till then you
>> may want to look at the fake bold option in simplefonts -
>> http://wiki.contextgarden.net/Simplefonts#Faking_italics_and_bold_fonts
> 
> Thanks for your advice.
> Unfortunately I did not manish to work with this font by simplefonts. I use the following simple setup:
> 
> 
> \definefont[arabic][file:bliblablup_0.ttf*arabic at 15pt]

\definefontfeature[fakebold][extend=1.1]

\definefont[arabic][file:<fontname>*arabic,fakebold at 15pt]

> \starttext
> \arabic\setupalign[r2l] ٱللَّهُ لَآ إِلَـٰهَ إِلَّا هُوَ ٱلْحَىُّ ٱلْقَيُّومُ
> \stoptext
> 
> How can I get these "fake bolds" with this setup? Or is it absolutely necessary to use Simplefont for these fake-bolds?

The feature is unrelated to simplefonts.

Wolfgang

Thanks Wolfgang, but that does not seem to work with this font. See attachment, the font is wider, but not bold. See the difference to the intended result, achieved with Corel Draw (with the same font), see attachment.

In ConTeXt I had the following code (see attachment for the compiled pdf):

++++++++++++++++
\definefont[arabic][file:bliblablup_0.ttf*arabic at 15pt]
\definefont[arabics][file:bliblablup_0.ttf*arabic at 15pt]
\definefontfeature[fakebold][extend=1.2]
\definefont[arabic][file:bliblablup_0.ttf*arabic,fakebold at 15pt]

\starttext
\arabic\setupalign[r2l]
ٱللَّهُ لَآ إِلَـٰهَ إِلَّا هُوَ ٱلْحَىُّ ٱلْقَيُّومُ
\blank\arabics\setupalign[r2l]
ٱللَّهُ لَآ إِلَـٰهَ إِلَّا هُوَ ٱلْحَىُّ ٱلْقَيُّومُ
\stoptext
++++++++++++++++

Huseyin