Currently in ArcGIS Explorer Online, if you'd like to choose which layers that're queried when using the Identify tool, you open up the Identify tool's options menu. At this point, by default the user must go through and click off the checkbox for each layer you don't want to be included to the group of layers that're queried by the Identify tool. This gets tedious if you have more than a few layers in your app. It'd be really great if select all/none buttons were added to this interface to make the process choosing which layers you'd like to be queried by the identify tool easier to use.
