SINGER White 5500 - Manual (Page 8)

For free-arm use
Without an extension table, the machine is
used as a free-arm model for convenient
sewing of trousers, sleeves, cuffs and the
like.
* Set the machine on a steady surface.
For flat-bed use
Attach the extension table by the following steps.
Step-1
Place the machine in the free-arm condition
on the table.
* Be sure the machine is mounted steadily.
Push down the extension support leg and
stand it.
Pull out the lever and slide in the extension
teble in the arrow direction until it is supported
by the two pins in front and back side of
the arm.
Fit two pins of the leg to the holes on the
lower left of the machine.
Detaching the extension table —
Pull out the lever and slide the table to the left.