Videonics PTM-1 User Manual page 151

Appendix C
Building and Using
a GPI Device
You can use a remote push-button device to trigger pages
in your Personal TitleMaker projects.
If you already have a GPI device you want to use, refer to
"Using GPI with Personal TitleMaker" on page 16 to learn
how to connect the device.
If you do not have a GPI device but would like to build
one, refer to the instructions on the following page.
A GPI device is especially useful when you are standing
some distance away from Personal TitleMaker but still want
to be able to control its operation.