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If you need to edit the Dynamic text attribute later on you can do so by locating the attribute again under Basic data - Attributes - Attribute group. Find the attribute and click on the edit icon.
The attribute from the above example will look like this on the products:
Keep in mind that with "Dynamic text" the result is based on several attributes, and if some of the attributes don't have values, it might not look right.
You cannot edit the value directly in the attribute. You then need to add values to the attributes that is missing data.
Formatting of dynamic texts In the configuration dialog for dynamic texts, supports both text and numbers. For text, you can choose uppercase, lowercase, or original value. For numbers, you can specify the number of decimals and whether trailing zeros should be removed. For example, if you choose 4 decimals and remove trailing zeros, 8.123456 becomes 8.1234, while 8.1200000 becomes 8.12. Click the angled brackets (<>) to the right of the mapping to view and change the formatting.