Change default slide layout in Powerpoint
I've found a solution that works for me on PowerPoint 2013:
- Go to Slide Master View. You should see a master layout and several dependent layouts (indented).
- Find the slide layout that you want to use as default layout for new slides.
- Move it so that it is the third item overall counting the master layout (i.e. the second indented layout underneath the master layout)
- Close Slide Master View.
- Try to add a new slide. It should be in the layout you need.
Please let me know if this works for you.