Have you properly imported the library into your map? You have to go into the Trigger Editor, right click into the top left library window, and then Library -> Import Library.
If you have done that also remember to change the Library ID, you can do that by right clicking the library (the "WASD" folder) and then go to Library -> Change Library ID or something like that.
If you have done that too the only problem that I could think of is that you read the instructions wrong/are searching in the wrong menus. The way you would set this library up is to create a trigger with the event "Key pressed". Then set the event value to either "Up" or "Down" and double click the actions field to create a new action. Search for "WASD" and choose the action that matches the event. The "WASD Set Controlled Unit" action should be used in a trigger with the "Map Initialization" event.
Have you properly imported the library into your map? You have to go into the Trigger Editor, right click into the top left library window, and then Library -> Import Library.
If you have done that also remember to change the Library ID, you can do that by right clicking the library (the "WASD" folder) and then go to Library -> Change Library ID or something like that.
If you have done that too the only problem that I could think of is that you read the instructions wrong/are searching in the wrong menus. The way you would set this library up is to create a trigger with the event "Key pressed". Then set the event value to either "Up" or "Down" and double click the actions field to create a new action. Search for "WASD" and choose the action that matches the event. The "WASD Set Controlled Unit" action should be used in a trigger with the "Map Initialization" event.