Editing Guitar Tab in Logic

I've just bought the new version of Logic Express, and I want to try writing some guitar tabs (it's probably not the best tool for the purpose - but it's worth a try).

Apple's documentation is really poor, and even Google isn't telling me what I need to know.

I started off creating a software instrument channel, created a few bars of blank midi, then switched to score view. It took a while to work out how to convert from a regular stave to a 6-line tab, but I right clicked something, changed the stave properties and I'm done.

I then worked out that dragging notes from the toolbox on the left of the screen into the tab allowed me to place a note (and helpfully, the instrument played the notes as I moved the mouse up and down before dropping the note in place).

What I can't work out is how to actually change the fret number of this new note. I can drag the note up (so the tone rises and the number changes from fret 0 to 4 (for example) on the A string before becoming 0 on the D string). I want to tab up frets > 4 though, and I just can't see how to do it. I tried highlighting the note and hitting a number, but that just cycles through screens. I also tried pressing option / control / command etc. when dragging and that didn't work either.

This has got to be really simple, right?