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v12	v13
15	15	Settings to do with map data layers shown in JOSM (ways/nodes etc)
16	16
17		You can cause an arrow to be drawn at the end of each segment, to show the direction in which the segment was drawn.
	17	You can cause an arrow to be drawn at the end of each segment, to show the direction in which the segment was drawn. You can also choose to have that arrow drawn only at the end of the way instead. Also, for some ways that have direction dependent tags (like oneway) oneway arrows can be shown.
18	18
19	19	You can choose to show the boundary of downloaded data. When downloading an area you get all the data within the rectangular bounding box you choose, and also, where any way within that bounding box extends outside the box it is completely downloaded. It therefore becomes difficult to precisely know which areas you have downloaded full data for. If you check the "Draw boundaries of downloaded data" box, yellow hatching is drawn over all the areas for which data has not been downloaded. You should avoid adding or editing data in areas of yellow hatching as it may duplicate already existing data.