void adjustDiffDisplay() {
		tool.getToolFrame().setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
		setDiffHighlight();

		MarkerSet diffMarkers = getDiffMarkers();
		diffMarkers.setMarkerColor(diffHighlightColor);

		setProgram2Selection(p2Selection);
		updatePgm2Enablement();
	}
Callback when user changes selection in the program2 diff panel.

Note: A P2 selection is handed to this method when a selection is made in the diff listing
which displays P2.
Ghidra/Features/ProgramDiff/src/main/java/ghidra/app/plugin/core/diff/ProgramDiffPlugin.java