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= Preferences > OSM Data =

[[JOSMImage(layer/osmdata_small,48,link=,middle,margin-right=20)]]

Settings controlling the drawing of OSM Data.

Some settings are only displayed in [wikitr:/Help/ExpertMode expert mode].

{{{#!comment
Below the caption of each option is the term. 
The first sentence in the definition is the tooltip. All later sentences are free.
}}}     

== Segment drawing options ==
 Draw Direction Arrows::
  Draw direction hints for way segments. \\
  Small arrows at the end of each segment show the direction in which it was drawn. \\
  ''Advance preference: `draw.segment.direction`''

  With **Only on the head of a way** arrows are drawn only at the end of a way. \\
  ''Advance preference: `draw.segment.head_only`''


 Draw oneway arrows::
  Draw arrows in the direction of oneways and other directed features. \\
  For some ways that have direction dependent tags (like oneway) multiple oneway arrows can be drawn on the way. \\
  ''Advance preference: `draw.oneway`''

 Draw segment order numbers::
  Draw the order numbers of all segments within their way. \\
  ''Advance preference: `draw.segment.order_number`''

 Draw segment order numbers on selected way::
  Draw the order numbers only for ways in the [wikitr:/Help/Dialog/SelectionList Selection]. \\
  ''Advance preference: `draw.segment.order_number.on_selected`

[[Image(PreferencesOsmData.png​,right,link=,margin-left=10,45%)]]

== Select and draw mode options ==
 Draw virtual nodes in select mode::
  Draw virtual nodes in select mode for easy way modification. \\
  Allows to add nodes by dragging the cross in the middle of each way segment in [wikitr:/Help/Action/Select Select] or [wikitr:/Help/Action/LassoMode Lasso] modes. \\  
  ''Advance preference: `mappaint.node.virtual-size`''

 Draw rubber-band helper line::
  A variable segment between the last set node and the mouse pointer is shown in [wikitr:/Help/Action/Draw Draw mode]. \\
  ''Advance preference: `draw.helper-line`''


== Options that affect drawing performance ==
These options are only available in [wikitr:/Help/ExpertMode Expert mode].

 Smooth map graphics (antialiasing)::
  Apply antialiasing to the [wikitr:/Help/MapView map view] resulting in a smoother appearance. \\
  ''Advance preference: `mappaint.use-antialiasing`''

 Smooth map graphics in wireframe mode (antialiasing)::
  Apply antialiasing to the map view in [wikitr:/Help/Action/WireframeToggle wireframe mode] resulting in a smoother appearance. \\
  ''Advance preference: `mappaint.wireframe.use-antialiasing`''

 Highlight target ways and nodes::
  Highlight target nodes and ways while drawing or selecting. \\
  Other objects glow when they are in the catch radius of the mouse pointer. \\
  ''Advance preference: `draw.target-highlight`''

 Draw only outlines of areas::
  This option suppresses the filling of areas, overriding anything specified in the active [wikitr:/Styles styles]. \\
  ''Advance preference: `draw.data.area_outline_only`''

 Hide labels while dragging the map::
  This option hides the textual labels of OSM objects while dragging the map. \\
  ''Advance preference: `mappaint.hide.labels.while.dragging`''


[[Image(PreferencesOsmDataExpert.png​,right,link=,margin-left=10,45%)]]

== Other options ==
 Draw boundaries of downloaded data::
  Draw the boundaries of data loaded from the server. \\
  When downloading an area you get and see all the data within the rectangular bounding box you chose. 
  This includes some ways extending outside that box.  
  It therefore becomes difficult to distinguish which areas contain full or partial data.  
  If you check the "Draw boundaries of downloaded data" box, yellow hatching is drawn over all the areas into which data has not been fully downloaded.  
  You should avoid adding or editing data in areas of yellow hatching as it may duplicate already existing data or conflict with data you don't see. \\
  ''Advance preference: `draw.data.downloaded_area`''

  This option can be changed with [wikitr:/Help/Menu/View Draw boundaries of downloaded data] on the View menu, too.

 Draw inactive layers in other color::
  Draw the inactive data layers in a different color. \\
  Map objects not on the [wikitr:/Help/Dialog/LayerList#ActivateLayer Active data layer] are drawn in grey color. \\
  ''Advance preference: `draw.data.inactive_color`''

 Display discardable keys::
  Display keys which have been deemed uninteresting to the point that they can be silently removed. ''**([wikitr:/Help/ExpertMode Expert mode] only)**'' \\
  They will be listed in light grey color in the Tags/Memberships panel. 
  These [/ticket/8512 outdated keys] will be stripped off from modified objects on upload. \\
  ''Advance preference: `display.discardable-keys`''

 Use auto filters::
  Display buttons to automatically filter numeric values of a predefined tag. \\
  [wikitr:/Help/Dialog/Filter#Autofilters Auto filters] can be enabled here and the tag to be used for the autofilter can be chosen. \\
  ''Advance preference: `auto.filter.enabled`''

 Rule::
  Rule defining which tag will provide automatic filters, below a certain zoom level. \\
  ''Advance preference: `auto.filter.rule`''


== Additional Tabs ==
Additional tabs may be added by [wikitr:/Plugins Plugins].

----
Back to [wikitr:/Help/Action/Preferences Preferences] \\
Back to [wikitr:/Help/Menu/Edit Edit Menu] \\
Back to [wikitr:/Help/Menu Main Menu] \\
Back to [wikitr:/Help Main Help]