Change Object Opacity in Blender 2.93

Question

Wondering how to change the opacity of an object in version 2.9. I've selected the object and have tried going to the Object Properties panel but I don't see where to adjust the opacity. I would just like to change the opacity of this object to 50% so that it's see-through. I've tried switching between Object Mode and Edit Mode, but still no difference.

Note that I'm not talking about transparency here I.e. I don't think that I should have to do everything that's listed in the answers here. Turning on Wireframe mode isn't what I'm looking for either - there has to be a way to adjust the opacity somewhere - right?

Answer 1

If you're talking about in the 3D viewport (solid mode), use the X-Ray settings:

If you want to do it in Rendered preview mode, you can do it by using the object's alpha. If using EEVEE, don't forget to change the Blend Mode to something other than Opaque.

Answer 2

In addition to the X-Ray and EEVEE material alpha methods, you can also control an object's opacity in Solid view mode through the color options controlled by Viewport Shading overlays. There are two main modes: Material-based, and Object-based.

Viewport Shading > Color > Material

When shading mode is set to Material, color of the objects in the scene are controlled by Properties > Material Settings > Viewport Display > Color. The color wheel here has an Alpha channel you can turn down for transparency. By default it's an off-white color, which you can see on the monkeys at the back. Obviously, this setting only shows up if your object has a material. All objects using that material in the active slot (like the two big monkeys here) will be colored the same:

Viewport Shading > Color > Object

When shading mode is set to Object, colors can be decided on an individual basis via Properties > Object Settings > Viewport Display > Color.

If there are no texture maps or vertex colors assigned to an object, Vertex mode will default to the Object settings, and Texture mode will default to the Material settings.