In Texis version 8 and later, two pragmas were added to Vortex:
syntaxversion: This changes the Vortex syntax version, so that legacy Vortex syntax (version 7) may be used. See here for details.
endif: These allow simple expressions to include or exclude code at compile time, based on Texis version, syntax version, etc. See here for details.
Caveat: With Texis version 8 and later, changing Compatibility
Version in texis.ini may cause all scripts to be
automatically re-compiled on their next run. See details in the