Watch the video:
Timestamps:
0:00 - Explanation
0:21 - Using Steam client
0:36 - Getting Steam trade URL
0:47 - Trade offer window
1:09 - Disable old URLTrading is great, but needing both people online can be annoying, hence Steam has Trade Offers. You can make a trade offer that can be approved, or denied by the person you’re offering. This is something super simple, but for those who don’t know where to access this, this tutorial should show you.
Steam Trade URL: http://steamcommunity.com/id/me/tradeoffers/privacy
Open it directly in Steam: steam://url/TradeOffers