Settings that modify how the world and entities behave are found in the SanboxVars file. There are three ways you can edit these settings:
Method 1: Through an Admin Account
1. Login to your server as an admin
2. In the top left of your screen, open the admin panel
3. Click on Sandbox Options
4. You can now modify your sandbox settings
Method 2: Through the Indifferent Broccoli Control Panel
1. Click the Advanced Server Settings
2. From here you can modify and change your settings
Method 3: Through the File Manager
/server-data/Server/
map_sand.bin
in the save folder or a soft reset