Exploring Glide-Reflections
While the letter F is translated (glide) and a reflection in the x-Axis, the lesson being shown applies to glide-translations. check each box separately/together to learn about the coordinates relate the Pre-Image.and Image.
Note: You can move Point Q to modify the translation even more than horizontally.
http://www.maa.org/sites/default/files/images/upload_library/47/Crowe/GeoGebra_Activity_4.html by Cheryll E. Crowe, Eastern Kentucky University