Which measurements are shown at the chart display settings?

This depends on the selected defaults when you added the patient.

If you opted for a manual input of measurements, the possible inputs are: Blood pressure, oximetry, weight and temperature. Be aware you have to select these services/inputs while adding the patients. These cannot be added or deleted afterwards. 

On the other hand, a patient account that includes the physical devices can optionally measure: Blood pressure, oximetry, weight and temperature. This depends on which devices were initially selected and thus included for the patient.