A If the opacity (%) is not displayed in the Layer window, it is likely because the "Layer Row Height" is set too small.

When the layer row height is set to be small (narrow), the opacity display is omitted due to limited space.

Please follow the steps below to increase the layer row height and check if the opacity appears.

[Steps]

1. Open the "Settings" window.
2. Go to the "User Interface" section.
3. Increase the value of the "Layer Row Height" setting.

Please check the Layer window again and adjust the height until the opacity is displayed.