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variable: $angle_offset -- rotate phase colscale
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default: 0.0
keyboard shortcuts:
  Cmd-o,O  =>  adjust angle_offset 0.01 up/down
  Cmd-y,Y  =>  adjust angle_cycles 0.1 up/down

The "angleoffset" entry (lower right) controls
the rotation of phase color wheels.

This operation happens *after* adjustment by
revphaseflag.

Values from 0.0 to 1.0 rotate the color scale in
a clockwise direction from 0 to 360 degrees.  For
a default polar angle stimulus slowly rotating in
the clockwise direction, slightly increasing the
value above 0.0 will compensate for a longer
hemodynamic delay.

Values larger than 1.0 or smaller than 0.0 are
acceptable (they will wrap).

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Cortex-position-dep adjustments for average data
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See R-click help for anglecycles.
