Note: be careful with {{code|textext.dflt}} which means DeFauLT. One could have expected {{code|textext.dlft}}) for LeFT.
<context source="yes" mode="mkivlmtx" >
\starttext
draw textext.drt ("DRT-" & MonTexte) shifted PB;
draw textext.dfltdlft("DFLTDLFT-" & MonTexte) shifted PB;
draw PB withpen pencircle scaled 1.5mm withcolor red;