I'm doing this from memory so bear with me...somebody chime in if I miss something...
Make sure your unit is in "Advanced Mode"...
Go into the "Navigation tab" and make visable "show directional arrow" visable..
Also under the "navigation tab" turn "Continuous Navigation" to "ON"...
Exit out of all the menus...
Press the "Goto" button on the unit...
Navigate thru the windows to the waypoint you want to go to..
Press enter on the unit...
Remember that you have to be going faster than 0.5mph for the directional arrow to show...slower than 0.5mph shows the dreaded "DONUT" that doesn't know where it is...