ligature question

This page briefly defines the 3 types of ligature (it's hard to find any definition)

https://support.office.com/en-us/article/turn-o...

The "Historical" ligatures will tend to have more flourishes, more swoops, just be much more fancy, and therefore LESS readable.

Ligatures 1- About ligatures and compatibility https://support.office.com/en-us/article/About-...

Ligatures are decorative or joined characters that are available for certain characters in some fonts.

Ligatures 2- Enable Ligatures in Microsoft Word https://www.vletter.com/help/font-faq/enable-li...

Advanced features like ligatures provide for special rules within the fonts that can tell the text routines in the system to substitute one representation of a character for another.

This next article is old, but especially at the end it presents a couple of worthwhile tips

Ligatures in Microsoft Word

http://editorium.com/archive/ligatures-in-micro...

Ligatures, in case you didn’t know, are letters that have been mashed together as one character. Why would anyone want that? For aesthetic reasons. (Yes, there is an ae ligature for words like “aesthetic.”) The ligatures used most often are fi and fl, accompanied by their friends ff, ffi, and ffl. That’s because these letter combinations really do look kind of ugly in many fonts, with the dot on the i running into the top of the preceding f, and so on.

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If you are at the point of using ligatures, you should also look into using Kerning. Kerning is reducing space between specific letter pairs that normally appear to be spaced too far apart. ie AV or AW or LT. It is most commonly used with larger font sizes in places like heading and banners.

Look into below Microsoft Help which describers Ligature and these 3 options

https://support.office.com/en-us/article/turn-o...