Tracking pixel always existed in ACS or ACC through the Nms Open formula. This option to add the pixel at the top of the email is new.The main reason is the content that’s built above 102 kB is lost in certain email clients. Needless to say, trimming content is the worst thing that can happen to your emails.Listing few of them:Loss of click-throughsLack of optimized metricsLoss of critical footer info (unsub, preferences center, copyright)Increased spam reportsLoss of interactivity (dynamic AMP ...

@derekw42533281, Yes you can add additional column on the load file activity by editing load file activity and goto column definition section to add an element and make sure ID column on the column definition within load file activity having the same name as in the batch file column. Other things like data type etc. need to define properly for that additional column. Thanks!