used external css file
in which i have defined the header height . the header has image
but though i increase of decrease the height in css , it has no effect on the page
how do i solve it
Code please 
To what element are you applying the height? An inline element cannot take dimensions unless it is made display:block.
We’d need to see your code to debug.
the menu shld come little down & the image height shld incease
The h1 has no height set. You just have padding holding the element open.
h1{padding:150px 0}
If you want more height then increase the padding.
Hello
Thanks a lot
i was changing height of some other element
Thanks
with regards to the same i wanted to know how could i make some templates and insert it in the respective positions
like the button menu & the news sections are same in all pages
so if i make a template i can call it in any pages
culd u give an example
You can use Sever Side Includes (SSI/ Php includes) to automate the process.
There are many tutorials around so best go straight there for more info.