You can not have a One page Menu in Powerdirector. There is always the Main page with a PLAY button. That can not be changed, you will always have a Scenes item on the Main page if more than one chapter or title.
All titles or chapters are on the Scenes pages.
The Return to Menu function is on either the TOP MENU button or the TITLE MENU button on the remote control for the DVD player. Often they are small buttons.
Chapter Skip is one of the double arrow keys near the Play button, some remotes call those buttons 'skip' there is forward and back Chapter/Title skip.