-more- without anchor

i’d like to use the -more-tag without the anchor. just because i don’t know how to acomplish the following:
i don’t want the entire posting on the front-page but just a short lead of the article that follows. then you click on (more) and then you can read the entire article. but now using the -more-tag, a HTML-anchor is generated. i want the page to begin on top and not to scroll down until the anchor.
i’m rather new to WordPress.
is there a way to modify how the -more-tag is displayed when the_content() is called? if so, where can i find this.
thx
tini