cursor problems (again)

I have downloaded the Debian package big-cursor (I have sadly given up on comixcursors for now - I'll try again in Stretch). It is definitely there: brian@Linux:/usr/share/fonts/X11/misc$ locate big-cursor /usr/share/doc/big-cursor /usr/share/doc/big-cursor/README.Debian /usr/share/doc/big-cursor/changelog.gz /usr/share/doc/big-cursor/copyright /usr/share/fonts/X11/misc/big-cursor.pcf.gz /var/cache/apt/archives/big-cursor_3.9_all.deb /var/lib/dpkg/info/big-cursor.list /var/lib/dpkg/info/big-cursor.md5sums /var/lib/dpkg/info/big-cursor.postinst /var/lib/dpkg/info/big-cursor.postrm /var/lib/dpkg/info/big-cursor.preinst brian@Linux:/usr/share/fonts/X11/misc$ But I cannot find a way of persuading Trinity Control Centre mouse themes to see it. Any suggestions? Or any other suggestions as to how I can get a large, preferably red, cursor (but any large one will do) in Debian 8 and Trinity 14? Thanks. Lisi