There are two different UI's available in Squeak,
- Morphic and
- MVC. MVC (Model-View-Controller) is the original Squeak UI, it looks a bit outdated, and is no longer the default interface which Squeak starts up in. Morphic is the newer UI (see the link for details). Most of the following customizations apply for Morphic, but some will also work with MVC. To work in the Morphic environment, see Setting up a Morphic project.
The easiest way to customize Squeak's UI is via the main menu (world menu), in MVC or Morphic.
There are several UI appearance changes that can be made from the "appearance..." submenu under the world menu.
These include changing
the window colors,
the screen depth,
rounded window corners,
full screen mode and more.
The other important place to look is in the Tools menu Preferences window in the top menu.
To get to the same window you may also choose the world menu and then 'appearance...' and then 'preferences...'. This applies to versions 2 up to 5.3.
Some key UI preferences include inboardScrollbars (for fixed vs. flop-out scrollbars), scrollBarsOnRight, roundedWindowCorners, and fastDragWindowInMorphic (for dragging a window outline versus a live window). Use the balloon help to learn more about the other preferences.
See Screenshots of Squeak for some pictures and links to some alternate looks for Squeak (mostly toward the bottom of the page).
Other UI-related goodies are available on the Goodies page.