Double-click the BFX Output node in the schematic to see its settings.
The settings in the Basic menu are non-editable, and are available so you can see the output resolution and timecode of the timeline segment you entered Batch FX with.
The Resize settings for the BFX Output node are only available if you attach a clip to the pipeline that is a different resolution than the original BFX output. In this case, the Resize settings are active, but you are not able to change the Destination settings (these must remain the same as when you entered BFX from the timeline).
Similar to the Resize settings, The RGB LUT settings for the BFX Output node are only available if you attach a clip to the pipeline that is a different resolution than the original BFX output.