The following example uses SET MBLOCK to create another table that is a copy of Clients but has a memo blocksize of 256 bytes embedded in its structure versus the default of 512 bytes. This technique applies if memo entries are normally less than 256 bytes and you want to minimize wasted space in the .DBT file:

use Clients
? set("mblock")
// Returns default of 8;each memo block = 512 bytes
set mblock to 4
copy to Clients2
use Clients2
? set("mblock")
// Returns 4
list files like Clients*.dbt
// Note that Clients2.dbt is smaller than Clients.dbt
close databases