When editing the Master Slide of a presentation, the formatting changes made to 
the master slide are not applied after applying them.

When I went to [View > Master > Slide Master] and clicked on the title textbox 
of the master slide to select the textbox itself, I then went to [Format > 
Area...] and under the [Area] tab, I selected "Color" and then I selected the 
color I wanted. After confirming my selection, the changes were not applied to 
the master slide. This issue is not only with the title textbox. When 
attempting to change the formatting of the bullet points on the master slide in 
the main textbox, applying formatting changes yielded no results. This problem 
occurs when attempting to change the fill color, font, and the bullet 
formatting, from my experience-- but it may extend further to other types of 
formatting.