




Binds a variable to either 
t
 or 
nil
, and executes a body of code to print a page only if the variable is 
t
.
The 
with-page
 macro binds 
printp
 to 
t
 if a page is to be printed, or 
nil
 if it is to be skipped. The 
body
 is executed once, and is expected to draw the document only if 
printp
 is 
t
. 
Each call to 
with-page
 contributes a new page to the document.