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* :attr:`pipeline.MneExperiment.brain_plot_defaults` can be used to customize PySurfer
plots in movies and reports.
* :attr:`pipeline.MneExperiment.trigger_shift` can now also be a dictionary mapping
subject name to shift value.
* The rejection GUI now allows selecting individual channels for interpolation
using the 'i' key.
* Parcellations based on combinations of existing labels, as well as
parcellations based on regions around points specified in MNI coordinates can
now be defined in :attr:`pipeline.MneExperiment.parcs`.
* Source space :class:`NDVar` can be indexed with lists of region names, e.g.,
``ndvar.sub(source=['cuneus-lh', 'lingual-lh'])``.
* API: :func:`plot.brain.bin_table` function signature changed slightly (more
parameters, new ``hemi`` parameter inserted to match other functions' argument
order).
* API: :func:`combine` now raises ``KeyError`` when trying to combine
:class:`Dataset` objects with unequal keys; set ``fill_in_missing=True`` to
reproduce previous behavior.
* API: Previously, :meth:`Var.as_factor` mapped unspecified values to
``str(value)``. Now they are mapped to ``''``. This also applies to
:attr:`pipeline.MneExperiment.variables` entries with unspecified values.