A font is a set of printable or displayable text characters in a specific style and size. The type design for a set of fonts is the typeface and variations of this design form the typeface family. Thus, Arial is a typeface family, Arial Black is a typeface, and Arial Black 10-point is a font. In practice, font and typeface are often used without much precision, sometimes interchangeably.
An outline font is a software typeface that can generate a scalable range of font sizes. A bitmap font is a digital representation of a font that is already fixed in size or a limited set of sizes. The two most popular outline font software programs on today's computers are TrueType and Adobe's Type 1. TrueType fonts come with both Windows and Macintosh operating systems. However, Type 1 is a standard outline font (ISO 9541). Both TrueType and Type 1 fonts can be used by Adobe's PostScript printers (although Adobe says that Type 1 fonts makes fuller use of the PostScript language).
Independent developers and graphic designers create new typefaces for both TrueType and Type 1. Adobe states that there are over 30,000 Type 1 fonts available. Fonts (in addition to those that comes with your computer) can be purchased as individual typeface families or in typeface collections.
When people type letters on the keyboard, straightforwardly can watch on the screen exactly what was the key pressed, but processing is different from things happening. Fonts are displaying on the screen in order to ASCII values. Let’s say, what is ASCII abbreviations? American Standard Code for Information Interchange. For example, of ASCII code is 65 equal to ‘A’ and 97 equal to ‘a’.
There fonts are available in different languages, I mean, they are with different characters style or pattern. So here you can understand that letters are a kind of script. that's why, there are too many style of scripts you see in the font combo box as well.
In font options, people can choose a lot of styles in order to their wish and need, however, there are plenty of fonts with their styles like Italic, Bold, underline, strikethrough, subscript or superscript, colours, text effects, text cases and font sizes as well. In MS Office 2016, there are a lot of texts effects available not like previous versions.
How to change the font style to selected text as I wished?
Select texts => Select Home menu => Do the font styling in the font section as you wished like font size, font style: bold, Italic, underline, X2, X2, colour, cases and more.
For more understanding, look at the screenshot please: