Am 24.04.2014 um 23:06 schrieb Elspeth McGullicuddy
Thanks for the answer,
I wanted to use to use the mechanism described in "about.pdf" for extensible arrows with possibly text above, under... I've had a look at the "xits-math.tma". Though U+2194 and U+21FE are both arrows, U+2194 has an "horizontal part" field in contrast to U+21FE how hasn't. So I guess the "otf" font might be the culprit. And meddle with fonts is impossible a task.
For the present I will content myself with something like \math{\overset{f}{-\kern-1ex\rightarrowtriangle}} There might be a better way to achieve that in Context, I don't know.
\setupbodyfont[xits] \starttext \starttabulate[|l|lm|] \NC \tex{overleftarrow} \NC \overleftarrow{top} \NC\NR \NC \tex{overrightarrow} \NC \overrightarrow{text} \NC\NR \NC \tex{overleftrightarrow} \NC \overleftrightarrow{text} \NC\NR \NC \tex{overtwoheadleftarrow} \NC \overtwoheadleftarrow{text} \NC\NR \NC \tex{overtwoheadrightarrow} \NC \overtwoheadrightarrow{text} \NC\NR \NC \tex{texoverleftharpoondown} \NC \overleftharpoondown{text} \NC\NR \NC \tex{overleftharpoonup} \NC \overleftharpoonup{text} \NC\NR \NC \tex{overrightharpoondown} \NC \overrightharpoondown{text} \NC\NR \NC \tex{overrightharpoonup} \NC \overrightharpoonup{text} \NC\NR \TB \NC \tex{underleftarrow} \NC \underleftarrow{text} \NC\NR \NC \tex{underrightarrow} \NC \underrightarrow{text} \NC\NR \NC \tex{underleftrightarrow} \NC \underleftrightarrow{text} \NC\NR \NC \tex{undertwoheadleftarrow} \NC \undertwoheadleftarrow{text} \NC\NR \NC \tex{undertwoheadrightarrow} \NC \undertwoheadrightarrow{text} \NC\NR \NC \tex{underleftharpoondown} \NC \underleftharpoondown{text} \NC\NR \NC \tex{underleftharpoonup} \NC \underleftharpoonup{text} \NC\NR \NC \tex{underrightharpoondown} \NC \underrightharpoondown{text} \NC\NR \NC \tex{underrightharpoonup} \NC \underrightharpoonup{text} \NC\NR \stoptabulate \stoptext Wolfgang