I wrote a text in LaTeX with the font size as 12 pt. Now, when I create a headline the size is also 12pt.

How can I change only the size of the headline? I need a 10 pt size for headlines.

MWE:

\documentclass[12pt,a4paper,twoside]{report}
\usepackage[top=2.5cm,inner=3cm,outer=2cm,bottom=2.5cm]{geometry}
\usepackage[belowskip=-10pt,aboveskip=6pt]{caption}
\usepackage{fancyhdr}
\pagestyle{fancy}
%\fancyfoot[LO,LE]{\textsc{\uff}}
%\fancyfoot[RO,RE]{\pet} %\fancyfoot[CO,CE]{\thepage}


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ok. Like o can see i´m new around here. sorry –  feedback Nov 8 '12 at 1:04
Please add a minimal working example (MWE) that illustrates your problem. It is considered a lot better to put in some code that will compile, as it makes it a lot easier for us to copy it into our text editor and work with it, and see exactly what it is you are trying to do. In your case: which documentclass do you use? Did you special configuration in your preamble for paper layout? –  Kurt Nov 8 '12 at 1:04
The code is very extensive and i dont how to put in here in same that same guys do. –  feedback Nov 8 '12 at 1:07
sorry but when i press enter it begins a news post –  feedback Nov 8 '12 at 1:08

\documentclass[12pt,a4paper,twoside]{report}
\usepackage[top=2.5cm,inner=3cm,outer=2cm,bottom=2.5cm]{geometry}
\usepackage[belowskip=-10pt,aboveskip=6pt]{caption}
\usepackage{fancyhdr}
\pagestyle{fancy}
\usepackage{blindtext}
\begin{document}
\Blinddocument
\end{document}


Since you want the font size of 10pt, you may also use \footnotesize instead of \fontsize{10}{12}\selectfont as noted by Enrico.

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Harish Kumar what is the meaning of the 12 that you include on the fontsize? –  feedback Nov 8 '12 at 1:20
Harish Kumar, your solution works fine. Thanks –  feedback Nov 8 '12 at 1:22
@HarishKumar: Isn’t the inter line space the space between the lines? I’d say the 12 give the baseline skip/the space between two baselines … –  Tobi Nov 8 '12 at 1:29
Sorry Wiki says inter line spacing is synonym … –  Tobi Nov 8 '12 at 1:30
You might want to say \footnotesize instead of \fontsize{10}{12}\selectfont. –  egreg Nov 8 '12 at 7:55