public void colorLines(Color c, int line, int nLines) {
		Graphics2D g = image.createGraphics();
		g.setColor(c);
		int yPos = topMargin + line * lineHeight;
		int h = nLines * lineHeight;
		g.fillRect(0, yPos, width, h);
		g.dispose();
	}
Each line is sized based on the font height and line padding on the top and bottom of the line.
The y coordinate tracks the top of the line, so a lines baseline (position to draw the text) 
is y + line padding + font accent.
Ghidra/Test/IntegrationTest/src/screen/java/help/screenshot/TextFormatter.java