I'm trying to split a selected polygon features with a selected line from another feature layer.

I, however, can't seem to get the tool for this to show up in my advanced digitize toolbar.

In other words, I need someone to tell me how to get my advanced digitizing toolbar to look like this: My current toolbar only contains the first half of these tools.
I need to gain access to the "Split selected feature with select line from another layer" tool and have it show up at the top of my screen.