When I open D+8 up, the studio is displayed and has the LINE tab open at the top and the PRESSURE tab open at the bottom.
I select the SWATCHES tab and this opens up the swatches at the top, with the pressure display smaller.
I then resize the studio by dragging the side to the left (or right) and the studio then defaults back to the original LINE / PRESSURE display. This doesn't do it everytime, I suspect it may depend what other tab is open with the swatches tab, but it does it most of the time.
This doesn't do it in Page+11 which has a similar tab interface.