Hi,

The appearance of a gap before the letter T has nothing to do with kerning per se, but with my use of smallcaps and kerning. 

I solved my problem by defining a font feature and applying it with the \setff command as described on the wiki.

\setuplayout[header=0pt, footer=0pt]
\setupstretched[width=6.25cm]

\definefontfeature[smallcapitals] [smcp=yes]

\starttext
  \setuphead[subject][style=\setff{smallcapitals}, textstyle={\kerncharacters[.40]}]
  \startsubject[title={Properties of Blood}]
  \stopsubject

  \setuphead[subject][style=\setff{smallcapitals},deeptextcommand={\kerncharacters[.40]}]
  \startsubject[title={Properties of Blood}]
  \stopsubject

  \setuphead[subject][style=\setff{smallcapitals},deeptextcommand={\stretched}]
  \startsubject[title={Properties of Blood}]
  \stopsubject

\stoptext



On Mon, Sep 14, 2015 at 5:33 PM, Michael Guravage <guravage@gmail.com> wrote:
Hi,

I am trying to use kerning in subject titles. \kernchracters works pretty good, but as you can see in the attached example, there is a gap before the Ts in Properties, and again in Praefatio and Praefationis. The \stretched command yields similar results, vis-à-vis the gaps. 

If somebody can enlighten me how to properly use kerning in this situation, I'd be immeasurably grateful. 

Cheers,

Michael