Modifying the ISPF environment

To make it easy to start Z Data Tools under ISPF, configure your ISPF environment as described in the following sections.

TSO region size

When using Z Data Tools from ISPF, it is recommended you use at least a 4 MB logon region size (in conjunction with the 32 MB of "extended" storage that TSO generally provides) to provide enough 24-bit storage for various functions to operate effectively. A suggested minimum TSO region size is 40 MB.

This starting value might need to be increased when performing intensive virtual storage functions, such as:
  • The use of templates with many fields or layouts.
  • In-memory editing of large files.