The tool for exploring stacks by clicking buttons and searching for text, and for adding and editing text.
Choose Find from the Go menu to display the Message box. Type or Option-drag across existing text to place the text in the Message box; press Return to search the current stack for the text you specified.
Add or edit text when the pointer is an I-beam
(whenever it's over editable text). Choose Text Style from the Edit menu to change font, size, style, or alignment of text in the current field—the field the insertion point or selected text is in.