storyline 360 master slide text font issue

Hello,

I am trying to learn storyline 360 templates and the use of the master slides.  I am very proficient with Office 365 PowerPoint so Master slides in storyline 360 should be easy.

However, creating a master slide I tweak the bullets with different font settings: bold, normal,....  The problem with storyline 360 template slide text field is it is all or nothing, meaning all the fonts are the same size and when I change one bullet to be bold and another to be regular storyline changes everything to the last setting: all bold and font size  or whatever I set the last text option to be.

I suspect I am doing something wrong, have a incorrect setting, something on my part (hopefully) so any assistance would be greatly appreciated.

Thanks

Richard