Apple Macintosh PowerBook 145 - Manual (Page 55)

4. Drag to the Open command so it becomes highlighted,
and then release the trackball button.
When you choose the Open command, the Trash icon opens
into a window (the Trash window). The Trash icon becomes
filled in with a pattern of dots, indicating that it has been
opened.
You should now have two windows on your Macintosh
desktop: the Macintosh HD window and the Trash window.
The Trash window is the active window. An active window has
a series of solid lines at the top of the window.
continues .
Chapter 2: Working on the Desktop 39
Active window