Typically you would just close the console and restart it and it will size the screen properly. That said, I typically use the actually IPMIView utility supermicro provides and not the one built into the web interface.
If that doesn't work, you'll need to pass a command line option to the boot loader like vga=0x318 will force it to 1024x768, however its been a while since I used the installer, I don't recall how to get it to pass that command line to the kernel during boot.