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\ No newline at end of file + +The source code for Tk is managed by fossil. Tk developers coordinate all +changes to the Tk source code at + +> [Tk Source Code](https://core.tcl-lang.org/tk/) + +Release Tk 8.7b1 arises from the check-in with tag core-8-7-b1. + +Highlighted differences between Tk 8.7 and Tk 8.6 are summarized below, +with focus on changes important to programmers using the Tk library and +writing Tcl scripts containing Tk commands. + +## Many improvements to use of platform features and conventions. + - Built-in widgets and themes are scaling-aware. + - Improved support of two-finger gestures, where available + - The `tk windowingsystem` "aqua" needs macOS 10.10 or later + +## New commands and options + - `tk sysnotify`: access to the OS notifications system + - `tk systray`: access to the OS tray facility + - `tk print`: access to the OS printing facility + +## Widget options + - New `ttk::progressbar` option: **-text** + - `$frame ... -backgroundimage $img -tile $bool` + - `$menu id`, `$menu add|insert ... ?$id? ...` + - `$image get ... -withalpha ...` + - All indices now accept the forms **end**, **end-int**, **int+|-int** + +## Improved widget appearance + - `ttk::notebook` with nondefault tab positions + +## Images + - Partial SVG support + - Read/write access to photo image metadata + |