Thanks Phil, This did help indeed. It's even better to create a separate filetype.vim in vim's runtime directory to prevent these settings from being overwritten at the next upgrade of vim. The file %rundir%\filetype.vim has to contain this: augroup filetypedetect au BufNewFile,BufRead *.dtml setf dtml augroup END Best regards, Roger ? You need to edit the filetype.vim file and add .dtml as a ? file type, it's pretty straight forward, add these lines ? (the one starting with " (double quote) is a comment and ? could be left out): ? ? " DTML ? au BufNewFile,BufRead *.dtml setf dtml ? ? ? hth ? ? Phil?