Material Batch Management

HI All:

when I creat batch for a material use "msc1n", it remind me of:

"If you want to create batches for this particular material, you must first set the indicator that specifies that the material is to be managed in batches in the material master record.

"

and where to set the indicator ?

and which configration is related?

Any help will be appreciated

Cynthia Yu