This entity can activate several different events (including itself) at specific times. It can only be used when the SmartEdit option in the multi_manager's properties is disabled. To add targets, click "Add" and enter the name of your first target entity in the "Key" dialog, and a delay of activation in seconds as the "Value", then click OK.
Name (targetname) - Property used to identify entities. You need this in order to activate the multi_manager.
Multithreaded (1) - See notes below for an explanation.
Be aware that a multi_manager can only have a maximum of 16 individual targets. If you add more than that, then some of them will simply not activate. If you need to activate more than 16, then you should use more than one multi_manager and activate all of them at once to get the timings more easily.
The keyvalues list are placed in the order that they were created in, instead of when they get activated first. This means that reading what a specific multi_manager does is messy, because it's not clearly visible what entity gets activated first. Keep that in mind when trying to edit already existing multi_managers.
Multithreading: Normally, If the multi_manager is called again before it has finished its work-order, it will ignore the new call and will just carry on with its work. However, with the Multithreaded flag enabled, when the manager is called again, it will continue working while another 'copy' of the multi_manager will start up. This solves various problems, mainly related to multiplayer games (where you might want a multi_manager to start up for each player that joins - if one player joins while the multimanager is still going for another player, a new thread needs to be created).
Beware of the above feature in maps with lots of entities, as a new copy of this entity will be spawned when it's triggered. This also happens when the entity calls itself as part of a looping routine. If the map is near the entity limit, after a number of copies are called (or a number of loops) the limit will be reached and the game will crash. If you're getting unexpected/unexplained crashes, this might be a reason.
Naming: When naming a multi_manager, do not call it "multi_manager", as the entity will not function properly. Make sure to give it a name that relates to your entity setup. Ex: "explosion_mm".