How can I define what is shown on the feed

Somewhere on here I saw about 6 months ago some posted steps to edits a file that would stop groups post from showing up on the main feed and it worked for me but I cannot find that post again so whoever posted that it worked well until my upgrade then I lost it and I cannot find your post again if you (whoever you were ) you see this can you post or message me those steps again

Thank you - I would really like to have more control over what is shown on top, what the mix of the feed is (maybe 3 group activities vs. 1 friend activity) and how often the feed is updated and whether it is updated automatically. :-)

Without tweaking the core it is only possible to set some settings via the Admin > System Settings > Feed Activity Properties.