I searched for Cutom Fiels and found 35 ideas with some very good suggestions among them.
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Could Autodesk please review and improve the custom fields.
My idea to add to the above is as follows.
When the custom field has a drop down, please allow multiselect as an option. Sometimes I have a list and I want to allow users to select more than one option, but I don't want to allow free text as that messes up my Power BI graphs. Other times, I want to restrict users to choosing a single option from the dropdown.