The basic browser window in the Apple Dylan environment is Binder. A Binder window consists of one or more linked panes. Each pane has an input, an output, an aspect, and a presentation style. A pane's input is the output of another pane: a pane displays information about the selected object(s) in its input pane. Aspects are properties of the input, such as source code, contents, callers, readers, writers, references or compiling warnings. This information can be presented in an outline or a graph. Inputs, aspects and styles can be used to construct replicas of the Smalltalk source browser, or static call graphs, or ad hoc displays such as the callers of readers of variables that the selected function writes. All views are live: recompiling a function updates any displays that include its who-calls information, for example.