Changing the mouse buttons

- On the world menu choose "Preferences and Services" - Search for "buttons" in the search pane - select "Swap mouse buttons" - that’s it (you dont need to press save)

Get all the packages in squeak

packages := (PackageInfo allPackages collect: [:each | each packageName ]) asSortedCollection.

Get all the classes of a package in squeak

Smalltalk organisation listACategoryNamed: aCategoryName

Create a new category