Give all of the different settings a try. Use the map screens in the GPS whichever way you would use your map. Choose what you prefer as the best. That is why there are several choices. Use the setting that is most comfortable to you.
Some manufacturers incorporate a course projection into the map page.
This estimates where you will be with a relationship to direction and distance, if you were to continue at the present speed and course. To activate the feature, go to the menu page and select the projection feature then location and direction as related to the time interval in the future. A selection of five minutes would show where you would be on the map screen, if you were to keep on the same course at the same speed for 5 minutes. The track history or Track Setup page allows you to select the time or, in some units, the distance intervals in which the unit logs your present track. The normal choice is AUTO, which means the unit will automatically measure your direction and speed and determine when and how many temporary waypoints it will record as a record of your present trip.