Update for Pro 2.1 - the bug lives on sadly in the latest iteration. For customers experiencing this issue, you may associate your Customer ID with the bug by calling Esri Support Services. With more customers added to the bug, perhaps it will be resolved sooner.
Hi, I'm having a similar issue here. I'm labeling points in a Scene but all the options are grayed out - I can't even select options from the Label Placement. I tried with different features - same thing. I'm currently using ArcGIS Pro 2.3.0
HI Robert. Thanks for your reply.I just moved it to the 2D Contents Pane and nothing changed in the Label Placement options. I moved it back to the 3D pane and now the labels are on top of the points - which is fine, but I'd like to make some changes on the "Position" section, but they are still grayed out.
Hi Eduardo - so in reviewing the bug report with other customers via Support Services, I've learned there is an enhancement request ENH-000119346 (Allow option to disable ArcGIS Pro 3D scene labels showing through buildings at street level." At first read, it seems unrelated, but in a deeper review of the request, it does reference the BUG in this thread and mentions that later releases will focus more on 3D labeling. So this means that this issue is with us for the near term sadly.
The issues with not controlling label placement are improved, but live on in 2.4.
These are labels that I had to create in the 3D layer. The label placement buttons look greyed out, but if you expand to open the full label panel you can change the position here.
However, the alignment options still don't work. I'd really like to be able to center my multi-line labels.