Just mark a way point anywhere in the driveway at home then edit it give it a name , symbole and edit the position , easy 

Thanks BL, actually chasing if there is a way of entering them onto a laptop program & then dropping them onto the plotter card to enter them into the plotter for a planned trip.
Sorry about the way it came across.

navonics on pc you can transfer your waypoints off a sd card into pc and also mark spots/planned routes from pc onto sd card into your chart

just make sure the formats the same as your using otherwise it can have the coords way out which i found out the hard way the first time then deleteing them then re-entering them in the correct wgs or other format you use

or just punch in new way point , enter the coords , if putting in coords from a chart/map or other written down coords

 My method is:

Open a beer, and have a drink with the missus, showing some interest in her day;

Excuse myself and grab another beer;

Find the gps unit by which time i generally need another beer;

Walk out to the boat on the front driveway, grabbing a beer on the way past the beer fridge in the garage;

Fit the gps unit onto the boat and power it up, by which time i need to pee, so better head to the loo and I'll grab a beer on the way back;

Sit on the boat and enter my waypoints while listening to some cool tunes from jj cale, and have a couple of beers in the peace and quiet;

Decide i am too drunk and i better check the accuracy of those waypoints again tomorrow night....

Works for me 

Haha... so i'm guessing it takes a while to enter them. ????

 The rush I'm with you Randall .