Like a cube or what? If you need to select objects that are same, look at the bottom of the screen.  See the picture. If not, then ignore the advice and be more specific about the type of objects that you're referring to...

 

Tip: At the beginning of creating, I always create a family grouping so should I want to change a particular group of objects mats, I just click on the famly's color.

 

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OS: Windows 11 64-bit
Poser: Poser 11.3 ...... Units: inches or meters depends on mood
Bryce: Bryce Pro 7.1.074
Image Editing: Corel Paintshop Pro
Renderer: Superfly, Firefly

9/11/2001: Never forget...

Smiles are contagious... Pass it on!

Today is the tomorrow you worried about yesterday