Blocks - Force the user to make a selection from a dropdown menu

Set the values as follows:

Select::::;NO::::0;YES::::+1

Then just add a status command with mandatory option.

Select:::: means an empty value (Select on its own does not work)

NO::::0 0 for no

YES::::+1 +1 for yes

PDF block type

This is usually solved a little differently.

1. Create a new text block with dropdown values and Mandatory

2. Add filename command to the qr-code pdf block with the value of the dropdown, that is {BlockName}

As a workaround, and since, in code, this dropdown is not the same as text, you can use attribute command with the required property.