Difficulty level: Beginner.
Using Replace modifier, you can replace the name of an input field (a field from your source feed) with the name that is required by your channel. So the only thing that changes is the name of the given field.
To use Replace, follow the simple steps below:
Find the field that you want to replace.
Add a modifier by simply clicking on the arrow down symbol.
Enter the value you want to replace it with and make sure to select Replace All.
Replace "Inch" with "IN". Your source store item details have all the items set to Inch as the items' unit of measurement but the channel requires the standard symbol. Simply use the Replace modifier to fix it.