<\body> The page breaking may be controlled very precisely by the user inside . In the submenu , you may specify the algorithm being used. Professional page breaking is best in print, but may slow down the editing when being used interactively in paper mode. Sloppy page breaking is fastest and medium is professional except for multicolumn material, for which the professional algorithm is significantly slower. You may also allow the page breaking algorithm to enlarge or reduce the length of pages in exceptional cases in the submenu . The stretchability of vertical space between paragraphs and so may be specified in . The factor is default; a smaller factor enforces a more rigid spacing, but the quality of the breaks may decrease. <\initial> <\collection>