Adds character scaling factor setting to the command buffer.
Promise<void>
| Error status | Description |
|---|---|
| ERR_PARAM | An invalid parameter was passed. |
| ERR_TIMEOUT | Failed to communicate with the devices within the specified time. |
| ERR_MEMORY | Necessary memory could not be allocated. |
- If all the parameters are set to "PARAM_UNSPECIFIED," ERR_PARAM will be returned
- For slip, endorsement, or validation printing, an integer from 1 to 2 can be set for the width and height.