[[TranslatedPages]]

= Locked Layer =
[[JOSMImage(lock,48,link=,middle,margin-right=20)]] **(Only visible in [wikitr:/Help/ExpertMode expert mode])**

An OSM [wikitr:/Help/Dialog/LayerList data layer] can be set to block any modification and implying the states [wikitr:/Help/Action/EncourageDiscourageUpload upload='never'] and [wikitr:/Help/Action/BlockDownload download='never'].


== States ==
||= **icon** =||= **state** =||= **osm element attribute** =||= **behavior** =||= **how to set in GUI** =||
||  [[JOSMImage(layer/osmdata_small,24,link=,middle)]]  ||  (no change)  || (optional: `locked='false'`) ||  no special behavior  ||  the default state  ||
||  [[JOSMImage(lock,24,link=,middle)]]  ||  locked  ||  `locked='true'`  || modification of the data in this layer is not possible and uploads and downloads are blocked ||  not possible  ||


== Code Example ==
Edit a `.osm` file in a text editor and instead of the usual `<osm version='0.6' generator='JOSM'>`,

  use **`<osm version='0.6' generator='JOSM' locked='true'>`**

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