Resize icons from the keyboard
⌘+ and ⌘− in Icon view, from 16 to 512 points. Each folder keeps its own size.
How to do it
- In Icon view (⌘1), press ⌘+ or ⌘− to make icons bigger or smaller, from 16 to 512 points.
- In List view (⌘2), ⌘+ and ⌘− switch between small and large icons.
- Each folder keeps its own size. ⌘J has the size slider and text size too.
Shortcuts
⌘+⌘−
More detail in the guide: Browsing files