Navigation button on slide master


I have 10 scene in my project and I put the navigation buttons (previous slide / nexts slide) into the slide masters. However, in some of my scene, the link between slides is no longer there. The buttons are working but it's the mess, I don't even know which slide is the first one. I prefer to have a vertical and clear list of my slide. Now it's horizontal without any string between them. Is it a bug ? Should I put all my buttons in all slide instead of slide masters ?

3 Replies
E-learning Thinkovery

Thanks for getting back to me! 
For all my slides, I need to have the buttons next / previous working, if I unassigned, the buttons will not work anymore, right ? The thing is that my buttons are working but the link between some of my slides disappeared, so the it's the mess, I don't have the vertical list of slides anymore.