Hi @jeanchris,
Thanks for posting! It looks like you are trying to edit the transparency of a body created in the "Sculpt" workspace of Fusion 360 to make it easier to match the form of an attached canvas.
This can be done by editing the "Opacity" of the sculpted form. To do this, right click on the body you want to edit the transparency of and use the "Opacity Control" command to select the percentage opacity you want for the sculpted form (0% being nearly completely transparent and 100% being fully opaque). This is shown in the screencast below.
Hopefully this answers your question! If it does not, please let me know and we will continue troubleshooting.
Kind Regards,
Paul Clauss
Product Support Specialist
