In QGIS 3.4 MADEIRA, I get no active "data defined override"; I click on the sybol right toio "Size", that I want to modify with a function. The words "data defined override" are pale grey and italic, and when I click on "description " I get this


I suppose I must activate it somewhere, but I was unsuccessfull to find where.


"Data defined override" is more of a caption than anything else. You either have to choose a field you want to derive your symbology size from or enter an expression.

enter image description here

  • oups ....that's evident! Thanks – catindri Jun 19 '19 at 16:16

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.