Purtz,
Are you asking how you propose a trade so that the image and the link show up in the trade proposal or how to load an image in the trade proposal?
I don't think you can load an image into a trade. The link and the image are from the database. To have your trade show these, use method 2 in building the trade proposal. This method also automatically updates both trade partners when they receive their cards. A little bit more time consuming in building atrade from multiple sets but saves a lot of time in updating your collection.
Bruno
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Check my Profile page to see my 2023 Goals and my Lists of sets near completion (5 cards or less) or sets getting close (less than 100 cards missing and 75% complete).
https://www.tcdb.com/Forum.cfm/Page/B/ID/0/?MODE=VIEW&ThreadID=25745&C=0