[[TranslatedPages]]

= View > History =

[[Image(source:trunk/images/dialogs/history.png)]] ''Keyboard shortcut:'' '''{{{Ctrl+H}}}'''

'''Display history infomation about OSM nodes, ways or relations''' in the history browser.[[BR]]
For each selected [Concepts/Object object] a seperate window will open. 

{{{#!comment
Note to translators: this part was moved from [wiki:Help/Dialog/History], you may copy from there if it is already availible in your language. After the moving it was substantially revised.
}}}

With the History Browser you can browse through the history of an object. On the left a list of object versions is displayed. Two versions (A and B) are marked with a dot. You can manually place both dots or click on a date or user name to place two dots at once. You can also use the up and down arrows on your keyboard to move the dots up and down.

The right part of the window is halved and the tags of the in the list selected versions (A and B) are displayed. If keys or values changed, they are highlighted in red.

[[Image(history_dialog.png)]]

== Basic information about a version ==

The History Browser displays basic information about each object version:

  * the '''object id''', the unique number of the object (displayed in the window title bar)
  * the '''version id''', the unique number the OSM server assigned to this object version (1, 2, 3,...)
  * the '''date of creation'''
  * the '''user''' who created this version. Click on the link to launch a browser with additional information about the user.
  * the '''changeset id''', i.e. the unique number of the changeset in which this object version was created. Click on the link to launch a browser with additional information about the changeset. Click on the [[Image(source:trunk/images/dialogs/changeset/changesetmanager.svg,16,middle)]] '''Changeset''' Button to open the [wiki:Help/Dialog/ChangesetManager Changeset Manager Dialog].
  * the '''changeset comment''' (if availible)
  * the '''changeset source tag''' (if availible)
  * the '''changeset imagery_used tag''' (if availible)
  * the '''object tags''' 

Via a right click on a version in the list of object versions, you can:
 * [[Image(source:josm/trunk/images/data/changeset.svg,16,middle)]] Lauch browser with information about the changeset
 * [[Image(source:josm/trunk/images/data/user.png,16,middle)]] Lauch browser with information about the user

== Object dependency ==
Depending on the [wiki:Help/Concepts/Object object type] which is selected, there is a different second tab on the right part of the window. The different tabs are axplained below. If something changed between version A and B or was removed it is highlighted in red. If something was added it is highlighted in green.

=== Node ===
The '''Coordinates tab''' displays the longitude and the latitude of the node and the distance if the position of the two selected versions is different.

[[Image(history_dialog_coordinates_tab.png)]]

=== Way ===
The '''Nodes tab''' displays all nodes of the way with their id. The arrow down or arrow up in the heading of the table indicates if the nodes are displayed from first to last or vice versa. This helps to easier inspect reverted ways. If you revert the direction of a way, not all the nodes are reordered in this view, but just the arrow switches and the nodes which are in reversed order get a yellow background. In the example image below you can see that in the last change of this way (which is by the way not yet uploaded in this case) the way was reversed, one node removed and two nodes added.

[[Image(history_dialog_nodes_tab.png)]]

=== Relation ===
The '''Members tab''' displays all members of the relation with their id, an icon of their object type and (if set) their role.

[[Image(history_dialog_members_tab.png)]]

== See also ==

* [[Image(source:trunk/images/dialogs/history.png,20)]] [Action/ObjectHistoryWeb History (web)]
* [[Image(source:trunk/images/info.png,20)]] [Action/InfoAboutElements Advanced info]
* [[Image(source:trunk/images/info.png,20)]] [Action/InfoAboutElementsWeb Advanced info (web)]

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