customised bar

Ken,

One way of doing this is by creating your own menu at the bottom of your slide (in the Slide Master) using shapes. Here's one I created using a black semi-transparent rectangle and some arrows and text. The arrow and text have a trigger that brings the user to the next slide and the previous slide. You could add as many icons and links as you want on the bar.

Then for each slide you need to go into it's Slide Properties and uncheck "Next" and "Back" buttons. In this example file I also went into the Player settings and unchecked the "Volume" option under "Controls". 

That is one way to create your own bars and buttons across the bottom. I've attached a .story file that you can use as a starting point! Hope this helps.