Please provide hints on using the GLX-D6 tuner.
1. Tune the guitar: to do so "stomp" on the silver colored big metal switch on the GLXD-6.
2. To change parameters of the tuner: first, be in tuner mode (see above) and have the guitar tuner feature working; second, press MODE to toggle through the tuner options (strobe tuning, reference pitch, et al) and use the UP/DOWN arrows to select what option is desired.