On 2013–02–07 Devendra Ghate wrote:

> \definebodyfont
>   [default]
>   [tfH= cmr12 scaled 7000]
> 
> still does not work and also wipes out definitions for \tfa \tfx etc.
> So
> 
> {\tfa 1}{\tf 1}{\tfx 1}
> 
> will just yield
> 
> 111

You're totally right.

> My MWE is:
> […]

\definefontsize
  [H]

\definebodyfontenvironment
  [default]
  [H=7]

\definefont
  [TitleFont]
  [Serif at 40pt]

\starttext
  {\tfH 1} {\tf 1} {\tfx 1}\\
  {\TitleFont 1. FooBar}
\stoptext

Marco