RuneScape has released legacy mode to the game. The July 14, 2014 update has left RuneScape players trying to figure out how to toggle from legacy mode to EOC and from EOC to legacy mode.
Worlds 33, 57, 120, and 136 are the free to play legacy-only worlds, worlds 18, 97, 115, and 137 are members' only legacy worlds, and world 66 and 135 are EOC-only worlds. In those worlds, you are automatically switched to the configuring mode and need to hop to switch it off.
RuneScape players can switch between modes anywhere in the game, unless they are engaged in combat. To properly switch, the RuneScape player should be not in the middle of something, or be able to take a brief break. It generally takes less than five seconds to toggle between EOC and legacy mode, assuming the RuneScape player knows which buttons to push.
The following slideshow list will detail the process of toggling between EOC and legacy mode in RuneScape.