server.properties on your server via SFTP or the file manager in your panel.On a Minecraft server from HostValues you can edit server.properties directly through the game panel.
Server.properties is the main configuration file for every Minecraft Java Edition server. It controls gamemode, difficulty, max players, view distance and more. The file is created automatically on the first server start.
Yes, most settings are only loaded at startup, so a restart is required. The whitelist can be reloaded without restarting using /whitelist reload.
For most servers, 6 to 10 chunks strikes a good balance between visibility and performance. Going above 10 significantly increases server load, especially with many players. On a HostValues server with NVMe storage you can comfortably run 8 to 10.