add default materials

[odarcan]

Maybe Im missing something here Im new to blender

If I add 10 trees each will show as gray and have no default materials I have to create for example 1 brown and 1 green generic material then click on each tree and their parts to select green or brown color, Im not interested in textures or things but just for simple visualisation it would be easier if each tree came with default colors or maybe in the generation dialog you could select preexisting materials and then each new is created with those materials as chosen.

how can you select all the added trees and set the leaf colors or branch colors of all for example?

[odarcan]

I learned about linking materials but that seems a lot of steps, having green leaves and brown stem on first creation would be easier