I have 2 nvida video cards, say I wanted to use one to edit video and one to mine, what would the code look like? I couldnt find it in the readme
read the Readme file once more

Use -di to select GPU's to mine with
EthDcrMiner64.exe -epool eu1.nanopool.org:9999 -ewal 0xd69af2a796a737a103f12d2f0bcc563a13900e6f -epsw x -eworker rig1 -di 1 (to use GPU #1 for mining)