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The RGN_TYPE_EXECUTE region was zero height - with the "Load & Save" button drawing outside of those bounds - so it didn't respond to events. This is because the region started off this size and does not change with simply adding the buttons. Although it has RGN_FLAG_DYNAMIC_SIZE, delayed reinit of regions is only currently supported on headers. This gives the execute region an initial (minimum) vertical size but also makes the region **hidden** by default. - Showing Prefs as an editor among others it will show the header but not the execute region. - Showing the Prefs in a popup window, hides the header region and shows the execute region. Ref D10636
.. Keep this document short & concise, linking to external resources instead of including content in-line. See 'release/text/readme.html' for the end user read-me. Blender ======= Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing. .. figure:: https://code.blender.org/wp-content/uploads/2018/12/springrg.jpg :scale: 50 % :align: center Project Pages ------------- - `Main Website <http://www.blender.org>`__ - `Reference Manual <https://docs.blender.org/manual/en/latest/index.html>`__ - `User Community <https://www.blender.org/community/>`__ Development ----------- - `Build Instructions <https://wiki.blender.org/wiki/Building_Blender>`__ - `Code Review & Bug Tracker <https://developer.blender.org>`__ - `Developer Forum <https://devtalk.blender.org>`__ - `Developer Documentation <https://wiki.blender.org>`__ License ------- Blender as a whole is licensed under the GNU Public License, Version 3. Individual files may have a different, but compatible license. See `blender.org/about/license <https://www.blender.org/about/license>`__ for details.