Ordinarily, the Spacebar overwrites and erases existing characters. When the SPOW (SPace OverWrite) check box is selected, spaces entered from the keyboard (not spaces echoed from the host), move the cursor over existing characters, but do not overwrite them with spaces:

This setting reflects the current terminal state, which can be changed by the host. The associated default setting, saved with the model, is HP SPOW Default.

Related Topics
Bullet HP terminal general preferences