Hi,
According to me, you can create a simple field with the name which you want and put in Edit View and Detail View where you want through STUDIO.
After it change in the custom/modules/<MODULE NAME>/metadata/editviewdefs.php or detailviewdefs.php
with the following code:
PHP Code:
array (
'label' => 'LBL_OF_YOUR_FIELD',
'name' => 'name_of_your_field',
'customCode' => ' <TEXTAREA name="{$fields.name_of_your_field.name}" value="{$fields.name_of_your_field.value}" rows="2" cols="20"> </TEXTAREA>',
),
I think the above code is enough which you want
Best regards,
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