The place() geometry manager is different than grid() or pack(). Rather than referencing against a cell location or a window's side, most of the time you'll be using a relative form of x and y coordinates. You can also use place() to overlap portions of widgets, which isn't allowed in either grid() or pack().
Invoking place() is similar to calling the other geometry managers:
$widget->place( [ option => value, . . . ] );
The options specified when you call place()affect how the widgets are put on the screen.
2.3.1. Place Options
-anchor => 'n' | 'ne' | 'e' | 'se' | 's' | 'sw' | 'w' | '
nw' | 'center'
Sets the position in the widget that will be placed at the specified coordinates.
-bordermode => '
inside' | 'outside' | 'ignore'
Determines whether or not the border portion of the widget is included in the coordinate system.
-height => amount
Sets the absolute height of the widget.
-in => $window
Indicates that the child widget will be packed inside $window instead of in the parent that created it. Any relative coordinates or sizes will still refer to the parent.
-relheight => ratio
Indicates that the height of the widget relates to the parent widget's height by ratio.
-relwidth => ratio
Indicates that the width of the widget relates to the parent widget's width by ratio.
-relx => xratio
Indicates that the widget will be placed relative to its parent by xratio.
-rely => yratio
Indicates that the widget will be placed relative to its parent by yratio.