The 'Additional' manual, in Section 7.1 reads, "If you have the chktex program installed you'll find in the Tools menu the entry: Check TeX.'
Here, with TeXLive-20170520 I find: $ locate chktex /usr/bin/chktex /usr/man/man1/chktex.1.gz /usr/share/texmf-dist/chktex /usr/share/texmf-dist/chktex/chktexrc /usr/share/texmf-dist/scripts/chktex /usr/share/texmf-dist/scripts/chktex/deweb.pl /usr/share/texmf-dist/scripts/chktex/chkweb.sh Yet it's not found in the lyx-2.2.3 Tools menu. Please suggest how I can add it to lyx. TIA, Rich
