Under course-up stabilized operation, what is the effect on the heading indicator when you alter your course?

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In course-up stabilization, the display is oriented so that the vessel’s direction of travel is always up the screen. When you change course, the imagery on the screen rotates to keep that course direction at the top, while a fixed reference on the display shows your heading. So the heading indicator stays in the same spot on the screen, providing a constant reference point as your course changes. This helps you maintain situational awareness during turns, because the scene moves around a stable heading reference rather than moving the heading indicator itself.