coolant level after change

I changed coolant today. Tried to go by the manual.
After the change, I refilled the engine and radiator thru the filler cap. Got it as full as possible, then filled the reservoir to the "full cold" mark. Ran the engine at idle speed for timed 2 minutes, then revved the engine two or three times. Coolant level still indicated full at the "fill" cap. Drove it about one-half mile, until the coolant temperature got to normal. Waited for engine to cool down then checked the level again. I could not see coolant at the fill opening. Reservoir indicated approximately the same level as before the ride. My question; is that normal? Should I have been able to see coolant at the "fill" location.

Thank you.

'07 SW 2,810 miles