private void clearSelectionMarkers() {
		if (p2SelectionMarkers == null) {
			return;
		}

		markerManager.removeMarker(p2SelectionMarkers, secondaryDiffProgram);
		p2SelectionMarkers = null;
	}
Reload the marked differences in the diff panel.
Ghidra/Features/ProgramDiff/src/main/java/ghidra/app/plugin/core/diff/ProgramDiffPlugin.java