# Packet 0x10/0x84
The client sends Packet 0x10 to the server to actually select an item in a menu (whereas [Packet 0x09](server-protocol/Packet_0x09) only requests additional information).
Clients send Packet 0x84 to change the lobby. It is of the same format as Packet 0x10.
## Dreamcast Packet Format
| Bytes | Meaning |
| --- | --- |
| 0x00 | Packet Type (0x10 or 0x84) |
| 0x01 | Flags (0x00) |
| 0x02-0x03 | Packet Size (0x000C) |
| 0x04-0x07 | Menu ID of item requested |
| 0x08-0x0B | Item ID of item requested |
