In general, for almost all standard applications and procedures the indicator orientation marker position will be on the LEFT side of the screen. In cardiac mode, the indicator orientation marker will be on the RIGHT side of the screen.
Ultrasound PROBE Indicator (Orientation Marker) Position
The “probe indicator” on the ultrasound probe can be identified as an orientation marker (ridge, indentation, groove, or nub) on one side of the probe. This corresponds to the indicator or orientation marker on the ultrasound image.