Controlling layout with the pack command

Tk provides three methods of geometry management—pack, grid, and the rarely used place command. We will be covering the pack and grid commands. The pack command is the basic geometry manager for Tk. When invoked, the pack command instructs the packer to arrange the widgets as specified. The packer is a geometry manager that arranges the elements of a window in order around the edges. In the following examples, we will see how to use the pack command.

Based on the options provided when invoked the pack command assumes several forms. The syntactical options are as follows:

Option	Interpretation
pack widget widget options	Behaves in the same manner as pack configure.
pack configure widget widget options:	This command accepts one or more widgets and pairs of options (if desired) to manage the pack. -after parent: The parent provided must reference a valid Tk widget. The widget being packed will be loaded after the widget specified. -anchor...