For information on editing, see the description of Plan 9 wiki syntax.
Many people have trouble configuring their monitors to the right size after the installation. The file /lib/vgadb contains definitions for the most common display sizes and some peculiar hardware that Bell Labs or other 9fans have used. Once you've found the desirable size, set monitor= to that name in plan9.ini(8). If you can't find an appropriate monitor entry, you can add your own using the instructions in [Adding a monitor to vgadb]. If your plan9.ini file isn't located in /n/9fat/plan9.ini, type ! 9fat: For example, this entry is being typed on a T30 laptop with 1400x1050 display. The plan9.ini on this machine has the following entry: ! monitor=t23 You can also change the resolution afterwards with aux/vga. Have a look at vga(8) for all details. In short: ! aux/vga -m vesa -l 1280x1024x16 or ! aux/vga -m vga -l to reset the display to a known state. Here's here is a list of some possible names for your display, for a complete list see /lib/vgadb: ! vga=640x480 # 60Hz, 31.5KHz ! vga=800x600 # 60Hz, 37.9KHz ! ! svga=640x480 ! svga=800x600 ! ! cinema=1280x768 # VAIO (pcg tr1mp in vmware). ! cinema=1152x768 # Titanium 550 (in virtual pc) ! ! xga=1024x768 ! lcd=xga ! multisync=1024x768 ! multisync=1024x768i ! multisync=1152x900 ! multisync=1280x1024 ! multisync=1280x1024i ! multisync=1376x1024 ! ! multisync65=multisync ! multisync65=1024x768 # 60Hz, 48.4KHz ! ! multisync75=multisync ! ! multisync110=multisync # Multisync monitors with video bandwidth up to 110MHz. ! ! multisync135=multisync # Multisync monitors with video bandwidth up to 135MHz. ! ! t23=1400x1050 # IBM Thinkpad ! t23=1280x1024 ! t23=1024x768 ! ! versa6xxx=1024x768 # NEC Versa 6030X/6200MX Laptop. ! versa6xxx=800x600 ! versa6xxx=640x480 ! ! 445x=1280x1024 # Nokia Multigraph 445X ! 445x=1600x1200 ! 445x=640x480 ! ! p815=1800x1350 # Viewsonic P815 ! p815=1792x1350 # 70Hz, xx.xKHz ! p815=1600x1200 # 75.4Hz, 93.5KHz ! p815=1024x768 ! ! sgi1600sw=1600x1024 # SGI 1600SW Flat Panel ! sgi1600sw=800x512