Are you sure you don’t mean version 12.3 or similar? Because 2.3 would be really old
I’d like to mention another very useful way to do this: just double click on an empty area in your diagram. This will bring up the so called Resource Catalog which will show you all the available relevant model elements for the current diagram you’re working on. So the initial and final nodes, decision and fork nodes and all available action types.
Note that you can also use the resource catalog by clicking on an element (it will be shown in the upper right corner) and then dragging it to the location where you want your new (connected) model element to be placed.
Hope that this can also help.