Hi Picky - For somewhere I don't know, ideally I plot the waypoints on my PC using Homeport and then swap to the Garmin using the SD card. I always have paper chartlets as a backup too, and they help with the overview too.
Have done directly on the unit but fiddly, as you say.
I find the split screen screen view can help too, but still not perfect.
Hope this helps
Steve
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