When I am using QGIS 2.8.3. I want to use a series of predetermined set of texts, such as 'wood', 'brick','concrete'.
I have created an enumeration file in SQL, I do want to link that my existing file using Edit Widget Properties.
This is greyed out unfortunately.
How can I overcome this?
I want to choose enumeration this is greyed out, as I have the materials in a Look up table/combo box.