Bug report #20724
[Auxiliary storage] Labels Buffer DD options do not have fields set and do not render in map canvas
|Affected QGIS version:||3.4.2||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||28544|
Enable labeling on a layer
Use the "change label" tool from the label toolbar, creating a data storage auxiliary DB.
In the change label properties dialog, there are some buffer related options (size, color) that you can change.
Modify the buffer properties: nothing happens in map canvas.
However, looking into the Layer properties dialog --> Attributes form (or Auxiliary storage) tab, you have both auxiliary_storage_labeling_buffercolor and auxiliary_storage_labeling_buffersize that you can unhide and modify. no changes either.
Give a look to the layer properties --> Labels --> Buffer tab, the properties are grayed while they should be enabled with yellow widgets for some.