Added more detail to the properties documentation

.docs/api/properties.md

@@ -15,6 +15,20 @@ properties.setValue(SlimeProperties.SPAWN_Z, 170);
 /* Add as many as you like */
 ```
 
+Properties can be modified after-the-fact aswell assuming it's loaded in the `worlds.yml` file.
+```java
+SlimePlugin plugin = (SlimePlugin) Bukkit.getPluginManager().getPlugin("SwoftyWorldManager");
+World world = // your world here
+WorldsConfig config = plugin.getConfigManager().getWorldConfig();
+WorldData worldData = config.getWorlds().get(world.getName());
+
+// Other properties can also be changed, this example is just using the spawn property as an example
+worldData.setSpawn(sender.getPlayer().getLocation().getBlockX() + ", " + sender.getPlayer().getLocation().getBlockY() + ", " + sender.getPlayer().getLocation().getBlockZ());
+
+// Save config after the fact
+config.save();
+```
+
 
 [1]: ../../swoftyworldmanager-api/src/main/java/com/grinderwolf/swm/api/world/properties/SlimeProperty.java
 [2]: ../../swoftyworldmanager-api/src/main/java/com/grinderwolf/swm/api/world/properties/SlimeProperties.java