Erase materials

[#1]

In a project I have around 300 created materials. If I desire to
eliminate 280 materials is something long the process. Exists another
easy way to do this?

[Anonymous]

Use the Attribute Manager. It is under the Options pull-down.

Be wary of deleting the materials though. see discussion

http://archicad-talk.graphisoft.com/viewtopic.php?t=2414