@Books987
Use Calibre 2.16 or later and put this as header template:
Code:
<div style="font-size:x-small;"><span class="even_page"> <p style="overflow:hidden;white-space:nowrap;max-width:40mm;text-overflow:ellipsis;float:left;margin-top:0px;margin-bottom:0px;padding-top:0px;padding-bottom:0px;">_AUTHOR_</p><p style="overflow:hidden;white-space:nowrap;max-width:40mm;text-overflow:ellipsis;float:right;margin-top:0px;margin-bottom:0px;padding-top:0px;padding-bottom:0px;">_TITLE_</p></div><div style="font-size:x-small;"><span class="odd_page"><p style="overflow:hidden;white-space:nowrap;max-width:70mm;text-overflow:ellipsis;float:left;margin-top:0px;margin-bottom:0px;padding-top:0px;padding-bottom:0px;">_SECTION_</p><p style="float:right;margin-top:0px;margin-bottom:0px;padding-top:0px;padding-bottom:0px;">_PAGENUM_</p></div><hr noshade width="100%" size=1>
You'll get section title and page number at odd pages, author and book title at even pages. Will save you some precious screen estate (header space is better utilized since 2.16).