Lines show on the page to indicate where the breaks are.
Half a million
about half a page
Yes, "half-page ad" should be hyphenated to show that "half" and "page" are acting together as a compound adjective to describe "ad."
Page border
Depends on how large your letterng is and how much spacing you use.
Notes Page
There is no 'visible half dividing line' present on any planet or moon. Much like State lines, which are imaginary lines to describe territories, but cannot actually be seen.
The 26th page.
none
The 42 Lines Bible was called that because each page had 42 lines of text.
WELL I CAN READ 97 PAGE IN THAT AMOUNT OF TIME AND THERE ARE ABOUT 20 LINES ON EACH PAGE