eeWiki bootable SD card - HDMI section & so on

I am following this guide to create an bootable SD card:

https://eewiki.net/display/linuxonarm/BeagleBone+Black#BeagleBoneBlack-HDMI

I am lost at the HDMI section. Is it talking about doing configurations after booting into the newly created SD card? Please help. Thank you so much.

Correct, after booting into your new system.

Regards,