Update 07-manipulating-MARC-data-advanced.md

episodes/07-manipulating-MARC-data-advanced.md

@@ -99,6 +99,7 @@ Also note, the build new field works on the first iteration of the field. When w
     This is a good time to re-iterate that MarcEdit has different ways to accomplish similar tasks. You can use Find All & Replace, Build New Field, or use the advanced subfield edit functions below. It's worth highlighting how these differ. In the example above, if there are records with the MARC field 856 that have a \$3 or other subfields besides \$u, then those subfields will not appear in the newly built MARC field 856. The Find All and Replace will only work on finding and replacing exactly what you entered in the Find All field. This is why it's important to profile data or use the Find All to review changes. For the Build New Field function, it is worth selecting the option to always create a new field and then check that new field to see if the build did what was expected. If it did, then you can use "Special Undo", and build the new field again with the option to "Replace Existing Field". 
 
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