The display settings include padding, border, etc. Two things don't behave right when right-clicking a previously-inserted image and choosing "Image properties":
1.) The horizontal and vertical padding are mixed up. Setting horizontal padding to 61 gives a lot of space above and below the image.
2.) If I set the border width to "0", the next time I right-click to edit the image properties, the value goes back to "1" (default) instead of "0". Strangely, with values greater than one, the border value seems to stick.