Normal mode typically refers to a difficulty that is not heroic mode. This setting is accessed from the party or raid leader's portrait menu.
The specific setting was removed in Patch 3.2.0, instead being replaced with the following:
- Dungeon difficulty:
- 5-player mode for the Normal mode instances.
- Raid difficulty:
- Patch 3.2.0 (2009-08-04): Changed the setting to 5 Player under the interface setting Dungeon difficulty.
- Patch 3.2.0 (2009-08-04): Changed the setting to 10 Player and 25 Player under the interface setting Raid difficulty.