Learning to use a new editor is an exercise in frustration and discovery. I figured we should make a list of "gotchas" that new editors might also run into. I'll start. Post your own below and I'll include the good ones in the main post. - Unlike WC3 and SC1, start locations are not a unit. You create start locations using the Point layer and assign them under Player Properties. This actually makes a lot of sense, when you think about it. - Units don't have an actor property, it's the other way around. That's why duplicating a unit without duplicating its actor causes it to have no graphics (the actor points to only the old unit). - A unit's cost (time/minerals/etc) is not specified in the unit data, but in the training ability data. For example, the SCV cost is specified in the command center's Train ability. - Maps start with a relatively thick border which is out of bounds. So if you make a really small map you won't be able to place any units unless you modify the bounds. - If a unit has a behavior with 0 points it will fail the "has behavior" condition, which would be alright except that 0 points is the default. Increase behaviors' min point value past 0 to workaround the issue. - The "pick each" loops seem more convenient, because you don't have to introduce a local variable, but they can't be nested. Don't use them, unless you like surprise errors when calling functions that happen to use the same loop. - If you duplicate a unit (and its actor) your unit shows up as a red sphere, because the actor's model paths are updated to include the new unit's id (and no such models exist). Set the paths back to see the original unit.