Syntax Highlighting and Emmet in .twig files

The php templating twig file format is not supported in any version of Dw, though it may be possible to add them yourself by adding it to the recognised file types, and then creating your own syntax highlighting file. Emmet i do not know if it is possible to modify a file for it to recognise twig, or if it will simply work anyway.

Edit: You could also file a feature request, by clicking on the 'About' menu item, and selecting 'feature request'.