In diesem Twitter-Beitrag von Tuomas Salo (@tuomassalo) geht es um Design-Prinzipien von Windows 3.1 (1995). Er erläutert, was man sich damals so dachte... "Not everything was perfect"...

https://twitter.com/tuomassalo/status/978717292023500805?s=20

1) Underlined letters indicate keyboard shortcuts. How handy!

2) Design clearly says: "We are buttons!". It's easy to find the wanted button, because they have some color.

3) Column titles look like buttons, since they are buttons.

4) The divider resembles window frame, giving a clue of resizability.

5) Always visible scroll bar immediately tells there's more to it, and how much.

6) The ellipsis hints that this button opens a dialog, instead of immediately executing an action.

7) The handle tells that this window can be resized.