This option allows you to configure the function that your Backspace key sends. On the VT terminal keyboard the backarrow key (<x) is configurable: It can send either a delete (ASCII 127) or a backspace (ASCII 8) character. In the Host Integrator, you can configure Backspace in the same manner.
This setting reflects the current terminal state of VT Backspace Sends, which can be changed by the host. The associated default setting, saved with the model, is VT Backspace Sends Default.