Go to the Cog on the lower navigation pane.Tap Doodle Pad.
The magnifying glass will allow you to search on a location, once you search and tap the location you're looking for, the map will automatically centre on that reference.
The next Icon is the marker thickness, tap this to see the different sizes of marker that can be applied to the map.
The next icon along is the Colour Palette, so you can colour code routes or points of interest.
The next icons are "Undo" to revert any changes, "Bin" to delete all markings on the map and "Save".
