To adjust the opacity of a pointcloud:
Navigate to the right-hand toolbar and click on the Layer manager icon.
In the Layer manager, click on the left-hand arrow to expand the layer.
Move the Opacity slider to adjust the transparency of your pointcloud or enter a value between 0 and 100.
Please note: if you change the opacity of your pointcloud, it will stay at the new value unless you choose to change it again, i.e. it will not revert back to 100% even if you end your session or log out.