Help pls i kinda need to do this quick

Aconstruction company is creating a powerpoint presentation describing how they calculate costs during each construction step. they plan to email this presentation to clients. the individual clients will be watching the presentation slide show on their own personal computers. what is the most important formatting step the company should take to make the text readable and pleasing to the eye?

How do i get the most points, without any effort?

How is the brightness of oled of the diaplay is controled