To add a new row, just click on the new row toolbar item, or hit return.

I can see some of the interface becoming confusing, though. I, for one, don’t get the idea of “hoisting”.

It is a powerful app but I was confused with it rapidly. Different styles for standard objects (NSTableColumn’s) and weird highlighting kinda threw me off immediately. I continued to try it for over an hour and I was still having issues doing simple tasks. Some things like the small icon in the gutter on the left don’t do anything sensible, like it switches from add a row to collapse. So how is it obvious to add a row again?

I will try it again once it is complete, hopefully soon.