This function erases the current device or moves to a new page.
A logical value to indicate whether the new-page operation should be saved onto the Grid display list.
The new page is painted with the fill colour
gpar("fill")), which is often transparent. For devices
with a canvas colour (the on-screen devices
quartz), the page is first painted with the
canvas colour and then the background colour.
There are two hooks called
setHook). The latter
is used in the testing code to annotate the new page. The hook
function(s) are called with no argument. (If the value is a character
get is called on it from within the grid