Right now whenever we search for something we always get only 20 results. To have more of them shown on one page we have to scroll all the way to the bottom of the page and click to change the number. Registered users should be able to set their preferred (maximum) number of search hits displayed via Special:Preferences, just like they can set a number of edits shown on Special:RecentChanges and Special:Watchlist.

Proposed change could look like this: