Hi,
I use MIO Spirit 680 with WinCe 6 and IGO Primo Europe 9.6.13.405512 whit resolution of 480x270.
I would to improve the size of the alphabetic characters of streets in balloons, with mapfontscale3dframed in sys.txt, but he not work.
Searched in the post I find:

[3d_config]
disable_roadsign_navigation_mode=0 ; =1 [balloons]; =0 [in street]
roadsign_always_framed=1 ;(0) always name balloons
roadsign_bitmaps=1

but he not work.
Is there anyone who knows the solution?
Sorry for bad english