With Formulayt it is possible to set default values for fields using the Submission URL Query String (QS).
In this example, we will set a default value for a product field based on a QS parameter.
First decide what the Query String parameter would be called (e.g. default_product).
Then create a hidden field and set prepopulation so it receives the value from the QS.
In this example we will call the hidden field DefaultProduct and it prepopulated from the QS default_product.
Then go to the Product field and add a new rule that states:
On form load, IF this field (Product) is blank AND default_product is NOT blank, then set the value of this field to the field DefaultProduct.
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