Show the selected geo in viewport ( not just its outline with yellow)

[Gemini]

Hi,
Is there an option to show the selected geometry in the viewport and not just its outline ( orange line ) ?

[Dr. Sassi]

Hi Gemini,

I do not know the project setup, so what do I look at?

There is an option in the
Main Menu> Modes> Viewport Solo (which affects the active object.

Besides that:
Can you place it on a layer and set the layer to Solo? What do you see then?

Is this helping?

If not, can you copy that object and paste it into a new file? What will be the result?

All the best