Preferences#

Starting with version 0.4.6, napari provides persistent settings.

Settings are managed by getting the global settings object:

from napari.settings import get_settings

settings = get_settings()
# then modify... e.g:
settings.appearance.theme = 'dark'

Sections#

The settings are grouped by sections and napari core provides the following:

APPLICATION#

Main application settings.

Confirm window or application closing#

Ask for confirmation before closing a napari window or application (all napari windows).

  • Access programmatically with SETTINGS.application.confirm_close_window.

  • Type: bool.

  • Default: True.

  • UI: This setting can be configured via the preferences dialog.

Console notification level#

Select the notification level for the console.

  • Access programmatically with SETTINGS.application.console_notification_level.

  • Type: NotificationSeverity.

  • Default: <NotificationSeverity.NONE: 'none'>.

  • UI: This setting can be configured via the preferences dialog.

Dask cache#

Settings for dask cache (does not work with distributed arrays)

  • Access programmatically with SETTINGS.application.dask.

  • Type: DaskSettings.

  • Default: DaskSettings(enabled=True, cache=16.837476352).

  • UI: This setting can be configured via the preferences dialog.

First time#

Indicate if napari is running for the first time. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.first_time.

  • Type: bool.

  • Default: True.

Grid Height#

Number of rows in the grid.

  • Access programmatically with SETTINGS.application.grid_height.

  • Type: ConstrainedIntValue.

  • Default: -1.

  • UI: This setting can be configured via the preferences dialog.

Grid Stride#

Number of layers to place in each grid square.

  • Access programmatically with SETTINGS.application.grid_stride.

  • Type: ConstrainedIntValue.

  • Default: 1.

  • UI: This setting can be configured via the preferences dialog.

Grid Width#

Number of columns in the grid.

  • Access programmatically with SETTINGS.application.grid_width.

  • Type: ConstrainedIntValue.

  • Default: -1.

  • UI: This setting can be configured via the preferences dialog.

GUI notification level#

Select the notification level for the user interface.

  • Access programmatically with SETTINGS.application.gui_notification_level.

  • Type: NotificationSeverity.

  • Default: <NotificationSeverity.INFO: 'info'>.

  • UI: This setting can be configured via the preferences dialog.

Delay to treat button as hold in seconds#

This affects certain actions where a short press and a long press have different behaviors, such as changing the mode of a layer permanently or only during the long press.

  • Access programmatically with SETTINGS.application.hold_button_delay.

  • Type: float.

  • Default: 0.5.

  • UI: This setting can be configured via the preferences dialog.

IPython interactive#

Toggle the use of interactive %gui qt event loop when creating napari Viewers in IPython.

  • Access programmatically with SETTINGS.application.ipy_interactive.

  • Type: bool.

  • Default: True.

Language#

Select the display language for the user interface.

  • Access programmatically with SETTINGS.application.language.

  • Type: Language.

  • Default: 'en'.

  • UI: This setting can be configured via the preferences dialog.

Opened folders history#

Last saved list of opened folders. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.open_history.

  • Type: List[str].

  • Default: [].

Playback frames per second#

Playback speed in frames per second.

  • Access programmatically with SETTINGS.application.playback_fps.

  • Type: int.

  • Default: 10.

  • UI: This setting can be configured via the preferences dialog.

Playback loop mode#

Loop mode for playback.

  • Access programmatically with SETTINGS.application.playback_mode.

  • Type: LoopMode.

  • Default: <LoopMode.LOOP: 'loop'>.

  • UI: This setting can be configured via the preferences dialog.

Preferences size#

Last saved width and height for the preferences dialog. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.preferences_size.

  • Type: Optional[Tuple[int, int]].

  • Default: None.

Saved folders history#

Last saved list of saved folders. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.save_history.

  • Type: List[str].

  • Default: [].

Save window geometry#

Toggle saving the main window size and position.

  • Access programmatically with SETTINGS.application.save_window_geometry.

  • Type: bool.

  • Default: True.

  • UI: This setting can be configured via the preferences dialog.

Save window state#

Toggle saving the main window state of widgets.

  • Access programmatically with SETTINGS.application.save_window_state.

  • Type: bool.

  • Default: False.

  • UI: This setting can be configured via the preferences dialog.

Window fullscreen#

Last saved fullscreen state for the main window. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.window_fullscreen.

  • Type: bool.

  • Default: False.

Window maximized state#

Last saved maximized state for the main window. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.window_maximized.

  • Type: bool.

  • Default: False.

Window position#

Last saved x and y coordinates for the main window. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.window_position.

  • Type: Optional[Tuple[int, int]].

  • Default: None.

Window size#

Last saved width and height for the main window. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.window_size.

  • Type: Optional[Tuple[int, int]].

  • Default: None.

Window state#

Last saved state of dockwidgets and toolbars for the main window. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.window_state.

  • Type: Optional[str].

  • Default: None.

Show status bar#

Toggle diplaying the status bar for the main window.

  • Access programmatically with SETTINGS.application.window_statusbar.

  • Type: bool.

  • Default: True.

APPEARANCE#

User interface appearance settings.

Highlight thickness#

Select the highlight thickness when hovering over shapes/points.

  • Access programmatically with SETTINGS.appearance.highlight_thickness.

  • Type: ConstrainedIntValue.

  • Default: 1.

  • UI: This setting can be configured via the preferences dialog.

Show layer tooltips#

Toggle to display a tooltip on mouse hover.

  • Access programmatically with SETTINGS.appearance.layer_tooltip_visibility.

  • Type: bool.

  • Default: False.

  • UI: This setting can be configured via the preferences dialog.

Theme#

Select the user interface theme.

  • Access programmatically with SETTINGS.appearance.theme.

  • Type: Theme.

  • Default: 'dark'.

  • UI: This setting can be configured via the preferences dialog.

PLUGINS#

Plugins settings.

Plugin sort order#

Sort plugins for each action in the order to be called.

  • Access programmatically with SETTINGS.plugins.call_order.

  • Type: Mapping[str, List[napari.settings._plugins.PluginHookOption]].

  • Default: {}.

  • UI: This setting can be configured via the preferences dialog.

Disabled plugins#

Plugins to disable on application start.

  • Access programmatically with SETTINGS.plugins.disabled_plugins.

  • Type: Set[str].

  • Default: set().

File extension readers#

Assign file extensions to specific reader plugins

  • Access programmatically with SETTINGS.plugins.extension2reader.

  • Type: Mapping[str, str].

  • Default: {}.

  • UI: This setting can be configured via the preferences dialog.

Writer plugin extension association.#

Assign file extensions to specific writer plugins

  • Access programmatically with SETTINGS.plugins.extension2writer.

  • Type: Mapping[str, str].

  • Default: {}.

Use npe2 adaptor#

Use npe2-adaptor for first generation plugins. When an npe1 plugin is found, this option will import its contributions and create/cache a ‘shim’ npe2 manifest that allows it to be treated like an npe2 plugin (with delayed imports, etc…)

  • Access programmatically with SETTINGS.plugins.use_npe2_adaptor.

  • Type: bool.

  • Default: False.

  • UI: This setting can be configured via the preferences dialog.

SHORTCUTS#

Shortcut settings.

shortcuts#

Set keyboard shortcuts for actions.

  • Access programmatically with SETTINGS.shortcuts.shortcuts.

  • Type: Mapping[str, List[str]].

  • Default: {'napari:toggle_console_visibility': ['Control-Shift-C'], 'napari:reset_scroll_progress': ['Control'], 'napari:toggle_ndisplay': ['Control-Y'], 'napari:toggle_theme': ['Control-Shift-T'], 'napari:reset_view': ['Control-R'], 'napari:delete_selected_layers': ['Control-Delete'], 'napari:show_shortcuts': ['Control-Alt-/'], 'napari:increment_dims_left': ['Left'], 'napari:increment_dims_right': ['Right'], 'napari:focus_axes_up': ['Alt-Up'], 'napari:focus_axes_down': ['Alt-Down'], 'napari:roll_axes': ['Control-E'], 'napari:transpose_axes': ['Control-T'], 'napari:toggle_grid': ['Control-G'], 'napari:toggle_selected_visibility': ['V'], 'napari:hold_for_pan_zoom': ['Space'], 'napari:activate_labels_erase_mode': ['1'], 'napari:activate_labels_paint_mode': ['2'], 'napari:activate_labels_fill_mode': ['3'], 'napari:activate_labels_picker_mode': ['4'], 'napari:activate_labels_pan_zoom_mode': ['5'], 'napari:new_label': ['M'], 'napari:decrease_label_id': ['-'], 'napari:increase_label_id': ['='], 'napari:decrease_brush_size': ['['], 'napari:increase_brush_size': [']'], 'napari:toggle_preserve_labels': ['P'], 'napari:activate_points_add_mode': ['2'], 'napari:activate_points_select_mode': ['3'], 'napari:activate_points_pan_zoom_mode': ['4'], 'napari:activate_points_transform_mode': ['5'], 'napari:select_all_in_slice': ['A', 'Control-A'], 'napari:select_all_data': ['Shift-A'], 'napari:delete_selected_points': ['Backspace', 'Delete', '1'], 'napari:activate_add_rectangle_mode': ['R'], 'napari:activate_add_ellipse_mode': ['E'], 'napari:activate_add_line_mode': ['L'], 'napari:activate_add_path_mode': ['T'], 'napari:activate_add_polygon_mode': ['P'], 'napari:activate_add_polygon_lasso_mode': ['Shift-P'], 'napari:activate_direct_mode': ['4'], 'napari:activate_select_mode': ['5'], 'napari:activate_shapes_pan_zoom_mode': ['6'], 'napari:activate_shapes_transform_mode': ['2'], 'napari:activate_vertex_insert_mode': ['2'], 'napari:activate_vertex_remove_mode': ['1'], 'napari:copy_selected_shapes': ['Control-C'], 'napari:paste_shape': ['Control-V'], 'napari:move_shapes_selection_to_front': ['f'], 'napari:move_shapes_selection_to_back': ['b'], 'napari:select_all_shapes': ['A'], 'napari:delete_selected_shapes': ['Backspace', 'Delete', '3'], 'napari:finish_drawing_shape': ['Escape'], 'napari:activate_image_pan_zoom_mode': ['1'], 'napari:activate_image_transform_mode': ['2'], 'napari:activate_vectors_pan_zoom_mode': ['1'], 'napari:activate_vectors_transform_mode': ['2'], 'napari:activate_tracks_pan_zoom_mode': ['1'], 'napari:activate_tracks_transform_mode': ['2'], 'napari:activate_surface_pan_zoom_mode': ['1'], 'napari:activate_surface_transform_mode': ['2']}.

  • UI: This setting can be configured via the preferences dialog.

EXPERIMENTAL#

Experimental settings.

Render Images Asynchronously#

Asynchronous loading of image data. This setting partially loads data while viewing. You must restart napari for changes of this setting to apply.

  • Access programmatically with SETTINGS.experimental.async_.

  • Type: bool.

  • Default: False.

  • UI: This setting can be configured via the preferences dialog.

Enable autoswapping rendering buffers.#

Autoswapping rendering buffers improves quality by reducing tearing artifacts, while sacrificing some performance.

  • Access programmatically with SETTINGS.experimental.autoswap_buffers.

  • Type: bool.

  • Default: False.

  • UI: This setting can be configured via the preferences dialog.

Minimum distance threshold of shapes lasso tool#

Value determines how many screen pixels one has to move before another vertex can be added to the polygon.

  • Access programmatically with SETTINGS.experimental.lasso_vertex_distance.

  • Type: ConstrainedIntValue.

  • Default: 10.

  • UI: This setting can be configured via the preferences dialog.

Enable Asynchronous Tiling of Images#

Renders images asynchronously using tiles. You must restart napari for changes of this setting to apply.

  • Access programmatically with SETTINGS.experimental.octree.

  • Type: Union[bool, str].

  • Default: False.

  • UI: This setting can be configured via the preferences dialog.

Shapes polygon lasso RDP epsilon#

Setting this higher removes more points from polygons. Setting this to 0 keeps all vertices of a given polygon

  • Access programmatically with SETTINGS.experimental.rdp_epsilon.

  • Type: ConstrainedFloatValue.

  • Default: 0.5.

  • UI: This setting can be configured via the preferences dialog.

Support for plugin specific settings will be provided in an upcoming release.

Changing settings programmatically#

from napari.settings import SETTINGS

SETTINGS.appearance.theme = "light"

Reset to defaults via CLI#

To reset all napari settings to the default values:

napari --reset

The preferences dialog#

Starting with version 0.4.6, napari provides a preferences dialog to manage some of the provided options.

Application#

application

Appearance#

appearance

Plugins#

plugins

Shortcuts#

shortcuts

Experimental#

experimental

Reset to defaults via UI#

To reset the preferences click on the Restore defaults button and continue by clicking on Restore.