One of the ways you can assign payments to expense accounts in Reconciler is by manually filtering to display a set of payments and defining what account all of those transactions should be assigned to.

Step 1 - Go to "Reconcile" view

Step 2 - Find the specific payments on the right portion of the screen that you want to assign (Use any necessary filters)
*Example: Searching for "Microsoft Bing Ads"

Step 3 - Click the "+" sign to expand filter option for Payment

Step 4 - Use the drop down to select the account you would like to assign the payment to and then click "Set"

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