Kodak retinette User Manual page 9

Left: To be ready for action all the time, carry the Retinette round the neck on a
short strap, preferably in it's ever-ready case.
Below: Whenever possible, support your body against something solid, or prop
your arms on a fence, railing, or even on your knees when sitting on the ground.
This is specially important with slow snapshot exposures. Use a cable release for
time exposures from a tripod.