as easier to add draft on the yellow sufrace??
How to do it?
It is a model without a tree.
This is not an easy thing to fix. My advice would be to use feature recognition and try to get the fillets to be recognized. Then you can roll back before the fillets and insert the draft that you need.
Eric makes a good suggestion, but if the FR does not recognize the fillets
You might try deleting the faces that've make up the fillet/s, apply the draft and then reapply the fillets.
It's very difficult to add or modify drafts when there is blend radius around that face.
Have you tried draft using parting line option? Sometimes it works depends on the complexity of the part.
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