Overflow menu
The three-dots button that hides secondary actions until you click it, so only the actions people actually use stay on screen.
See it
What it is
An overflow menu is one small button, usually three dots, holding the actions a toolbar or row cannot fit. Click it and a menu drops out with rename, duplicate, archive, delete. The icon names are folk taxonomy worth knowing: three vertical dots is a kebab, three horizontal dots is a meatball, three lines is a hamburger, a grid of dots is a bento.
Reach for it when a surface has more than two or three actions and only the top ones deserve permanent space. Keep the primary action visible and inline; overflow takes the rest. In a table row it usually appears on hover, which is exactly why the same actions need a path that does not require a mouse.
Gotcha: overflow menus eat discoverability. If nobody finds a feature, check whether it lives behind three dots. And a three-dot button with one item inside it is just a badly labelled button.
Ask AI for it
Add an overflow menu to each row of this list: a ghost icon button with a vertical three-dot (kebab) icon, 32px square, at the right edge, revealed on row hover or keyboard focus and always visible on touch. Clicking opens a dropdown anchored to the button, flipping above when there is no room below, with items Rename, Duplicate, Archive, then a separator and a destructive Delete in red. Full keyboard support: Enter or Space to open, arrow keys to move, Escape to close and return focus to the trigger. Give the button an aria-label of 'More actions'.