custom field at answer form / step by step guide

2.19K viewsGeneralcustom custom field

hi, i’m sorry cause i repeat the same question but i want to know how can i add custom field at answer form (a really step by step guide if is possible).
I read the orders at this link¬† but i can’t understand where (in which file) to put a code, how to put a code etc.
If you know and you have time please submit a guide about custom fields………thanks for the support.

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thanks about the example…..where (into which file) i must add this code?

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ok, i found it….to the file “functions.php”

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