Compare and discuss between electromechanical and electronic era of computer

What is the name of the option in most presentation applications with which you can modify slide elements? 1. the option enables you to modify a slide element in most presentation applications.

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)

Which view in a presentation program displays a split window showing the slide in the upper half and a blank space in the lower half?