Forum:Blog settings?

Hello! I've just started to write on my new blog, and it's a very nice feature! I've only a little problem on settings: how can I limit or define the number of rows to appear in main blog page? Is it possible not to include any images or video-code in main blog page? This question because there are some unwanted code that appear in main blog page, that I don't know how to fix. Also the number of rows for my first three posts are different and apparently without logic. Someone can help me? Gifh 05.10.09 10:57 (local time)