In SP1, the ink drawing strokes are regrouped as you are selecting them. And
then you can resize them collectively.
This doesn't work as well if your selection is mixed. It also doesn't work
that well if some of the drawing are locked (Edit->Allow Drawing to
auto-merge is not checked). So if you expect to do this a lot on a page, it
is preferable to set the pen as Drawing only.
Also in SP1 final, it is a lot more reliable to threat ink as drawing.
While not very convenient (in other words, hopefully you won't have to do
this very often, and future versions should make this easier), these
"recovery" steps can allow you to convert a whole page to be freeform
drawings:
1) Select all (Ctrl-A on the page until everything on that page is selected
2) Tools->Treat selected ink as->Drawing
3) Select all (Ctrl-A on the page until everything on that page is selected
4) Edit->Allow drawing to auto-merge (this should uncheck it.)
5) Edit->Allow drawing to auto-merge (this should check it. If it is already
checked, skip this step.
Hope this helps.
Benoit (ms)