How to Pin a World to the Top of Your World List
Finding the Pin Control
Open the singleplayer world selection screen. Each world entry has a small pin or star icon next to its name. Click that icon to favorite the world. You can do this for as many worlds as you like — there is no cap on how many you pin.
What Happens After Pinning
Once pinned, the world jumps to the top section of the list, above all unpinned worlds. If you pin several worlds, they sort among themselves by last played date, exactly like the normal list does. This means your most recently played pinned world sits at the very top, and the rest of your favorites follow in recency order beneath it.
Unpinning
Click the same icon again to remove the favorite status. The world drops back into the regular list and sorts by last played date with everything else. Pinning is purely a display and safety feature — it does not move, copy, or modify the world folder in any way.
Tips
Pin the worlds you are actively playing so you never have to scroll past old test worlds to reach them. Because the mod is client-side only, your pins are stored locally and do not affect what other players see on a server or shared setup.