# JOSM Boundaries In JOSM I once made the mistake of downloading an area then subsequently editing outside that area, without realising it was outside the extents of my downloaded region. So I ended up adding objects that were already there, but I didn't see them as I hadn't downloaded that area. I quickly found "Draw boundaries of download data" under the Preferences>Display>OSM Data and turned it on. No more of such problems. I think that from a usability point of view, it should be enabled by default.

In JOSM I once made the mistake of downloading an area then subsequently editing outside that area, without realising it was outside the extents of my downloaded region. So I ended up adding objects that were already there, but I didn't see them as I hadn't downloaded that area. I quickly found "Draw boundaries of download data" under the Preferences>Display>OSM Data and turned it on. No more of such problems. I think that from a usability point of view, it should be enabled by default.