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.

Brush size on mouse move modifiers#

Modifiers to activate changing the brush size by moving the mouse.

  • Access programmatically with SETTINGS.application.brush_size_on_mouse_move_modifiers.

  • Type: BrushSizeOnMouseModifiers.

  • Default: <BrushSizeOnMouseModifiers.ALT: 'Alt'>.

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

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=4.191693824).

  • 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.

New labels data type#

data type for labels layers created with the “new labels” button.

  • Access programmatically with SETTINGS.application.new_labels_dtype.

  • Type: LabelDTypes.

  • Default: <LabelDTypes.uint8: 'uint8'>.

  • 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.

Plugin widget positions#

Per-widget last saved position of plugin dock widgets. This setting is managed by the application.

  • Access programmatically with SETTINGS.application.plugin_widget_positions.

  • Type: Mapping[str, str].

  • Default: {}.

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.

Font size#

Select the user interface font size.

  • Access programmatically with SETTINGS.appearance.font_size.

  • Type: ConstrainedIntValue.

  • Default: 9.

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

Highlight#

Select the highlight color and thickness to use when hovering over shapes/points.

  • Access programmatically with SETTINGS.appearance.highlight.

  • Type: HighlightSettings.

  • Default: HighlightSettings(highlight_thickness=1, highlight_color=[0.0, 0.6, 1.0, 1.0]).

  • 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.

Update status based on layer#

Calculate status bar based on current active layer and mose position.

  • Access programmatically with SETTINGS.appearance.update_status_based_on_layer.

  • Type: bool.

  • Default: True.

  • 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[app_model.types._keys._keybindings.KeyBinding]].

  • Default: {'napari:toggle_console_visibility': [<KeyBinding at 0x7fd3e49f0f10: Ctrl+Shift+C>], 'napari:reset_scroll_progress': [<KeyBinding at 0x7fd3e49f0e20: Ctrl>], 'napari:toggle_ndisplay': [<KeyBinding at 0x7fd3e49f0b50: Ctrl+Y>], 'napari:toggle_theme': [<KeyBinding at 0x7fd3e49f0f40: Ctrl+Shift+T>], 'napari:reset_view': [<KeyBinding at 0x7fd3e49f1090: Ctrl+R>], 'napari:delete_selected_layers': [<KeyBinding at 0x7fd3e49f11e0: Ctrl+Delete>], 'napari:show_shortcuts': [<KeyBinding at 0x7fd3e49f1330: Ctrl+Alt+/>], 'napari:increment_dims_left': [<KeyBinding at 0x7fd3e49f1480: Left>], 'napari:increment_dims_right': [<KeyBinding at 0x7fd3e49f15d0: Right>], 'napari:focus_axes_up': [<KeyBinding at 0x7fd3e49f1720: Alt+Up>], 'napari:focus_axes_down': [<KeyBinding at 0x7fd3e49f1870: Alt+Down>], 'napari:roll_axes': [<KeyBinding at 0x7fd3e49f19c0: Ctrl+E>], 'napari:transpose_axes': [<KeyBinding at 0x7fd3e49f1b10: Ctrl+T>], 'napari:rotate_layers': [<KeyBinding at 0x7fd3e49f1c60: Ctrl+Alt+T>], 'napari:toggle_grid': [<KeyBinding at 0x7fd3e49f1de0: Ctrl+G>], 'napari:toggle_selected_visibility': [<KeyBinding at 0x7fd3e49f1f00: V>], 'napari:toggle_unselected_visibility': [<KeyBinding at 0x7fd3e49bbac0: Shift+V>], 'napari:show_only_layer_above': [<KeyBinding at 0x7fd3e49bb6d0: Shift+Alt+Up>], 'napari:show_only_layer_below': [<KeyBinding at 0x7fd3e49bb8e0: Shift+Alt+Down>], 'napari:hold_for_pan_zoom': [<KeyBinding at 0x7fd3e49bbc40: Space>], 'napari:activate_labels_erase_mode': [<KeyBinding at 0x7fd3e49bbe80: 1>, <KeyBinding at 0x7fd3e49f0d60: E>], 'napari:activate_labels_paint_mode': [<KeyBinding at 0x7fd3e49f2200: 2>, <KeyBinding at 0x7fd3e49f2380: P>], 'napari:activate_labels_polygon_mode': [<KeyBinding at 0x7fd3e49f2470: 3>], 'napari:activate_labels_fill_mode': [<KeyBinding at 0x7fd3e49f25c0: 4>, <KeyBinding at 0x7fd3e49f2710: F>], 'napari:activate_labels_picker_mode': [<KeyBinding at 0x7fd3e49f2860: 5>, <KeyBinding at 0x7fd3e49f29b0: L>], 'napari:activate_labels_pan_zoom_mode': [<KeyBinding at 0x7fd3e49f2b00: 6>, <KeyBinding at 0x7fd3e49f2c50: Z>], 'napari:activate_labels_transform_mode': [<KeyBinding at 0x7fd3e49f2da0: 7>], 'napari:new_label': [<KeyBinding at 0x7fd3e49f2ef0: M>], 'napari:swap_selected_and_background_labels': [<KeyBinding at 0x7fd3e49f3040: X>], 'napari:decrease_label_id': [<KeyBinding at 0x7fd3e49f3190: ->], 'napari:increase_label_id': [<KeyBinding at 0x7fd3e49f32e0: =>], 'napari:decrease_brush_size': [<KeyBinding at 0x7fd3e49f3430: [>], 'napari:increase_brush_size': [<KeyBinding at 0x7fd3e49f3580: ]>], 'napari:toggle_preserve_labels': [<KeyBinding at 0x7fd3e49f36d0: B>], 'napari:reset_polygon': [<KeyBinding at 0x7fd3e49f3820: Escape>], 'napari:complete_polygon': [<KeyBinding at 0x7fd3e49f3970: Enter>], 'napari:activate_points_add_mode': [<KeyBinding at 0x7fd3e49f3ac0: 2>, <KeyBinding at 0x7fd3e49f3c10: P>], 'napari:activate_points_select_mode': [<KeyBinding at 0x7fd3e49f3d90: 3>, <KeyBinding at 0x7fd3e49f3eb0: S>], 'napari:activate_points_pan_zoom_mode': [<KeyBinding at 0x7fd3e49f3fd0: 4>, <KeyBinding at 0x7fd3e4a0c100: Z>], 'napari:activate_points_transform_mode': [<KeyBinding at 0x7fd3e4a0c280: 5>], 'napari:select_all_in_slice': [<KeyBinding at 0x7fd3e4a0c3a0: A>, <KeyBinding at 0x7fd3e4a0c4c0: Ctrl+A>], 'napari:select_all_data': [<KeyBinding at 0x7fd3e4a0c5b0: Shift+A>], 'napari:delete_selected_points': [<KeyBinding at 0x7fd3e4a0c730: 1>, <KeyBinding at 0x7fd3e4a0c850: Delete>, <KeyBinding at 0x7fd3e4a0c970: Backspace>], 'napari:activate_add_rectangle_mode': [<KeyBinding at 0x7fd3e4a0ca90: R>], 'napari:activate_add_ellipse_mode': [<KeyBinding at 0x7fd3e4a0cb80: E>], 'napari:activate_add_line_mode': [<KeyBinding at 0x7fd3e4a0cd00: L>], 'napari:activate_add_path_mode': [<KeyBinding at 0x7fd3e4a0ce20: T>], 'napari:activate_add_polygon_mode': [<KeyBinding at 0x7fd3e4a0cf40: P>], 'napari:activate_add_polygon_lasso_mode': [<KeyBinding at 0x7fd3e4a0d060: Shift+P>], 'napari:activate_direct_mode': [<KeyBinding at 0x7fd3e4a0d180: 4>, <KeyBinding at 0x7fd3e4a0d2a0: D>], 'napari:activate_select_mode': [<KeyBinding at 0x7fd3e4a0d3c0: 5>, <KeyBinding at 0x7fd3e4a0d4b0: S>], 'napari:activate_shapes_pan_zoom_mode': [<KeyBinding at 0x7fd3e4a0d630: 6>, <KeyBinding at 0x7fd3e4a0d750: Z>], 'napari:activate_shapes_transform_mode': [<KeyBinding at 0x7fd3e4a0d870: 7>], 'napari:activate_vertex_insert_mode': [<KeyBinding at 0x7fd3e4a0d990: 2>, <KeyBinding at 0x7fd3e4a0dab0: I>], 'napari:activate_vertex_remove_mode': [<KeyBinding at 0x7fd3e4a0dbd0: 1>, <KeyBinding at 0x7fd3e4a0dcc0: X>], 'napari:copy_selected_shapes': [<KeyBinding at 0x7fd3e4a0de40: Ctrl+C>], 'napari:paste_shape': [<KeyBinding at 0x7fd3e4a0df60: Ctrl+V>], 'napari:move_shapes_selection_to_front': [<KeyBinding at 0x7fd3e4a0e080: F>], 'napari:move_shapes_selection_to_back': [<KeyBinding at 0x7fd3e4a0e1a0: B>], 'napari:select_all_shapes': [<KeyBinding at 0x7fd3e4a0e2c0: A>], 'napari:delete_selected_shapes': [<KeyBinding at 0x7fd3e4a0e3e0: 3>, <KeyBinding at 0x7fd3e4a0e500: Delete>, <KeyBinding at 0x7fd3e4a0e620: Backspace>], 'napari:finish_drawing_shape': [<KeyBinding at 0x7fd3e4a0e740: Enter>, <KeyBinding at 0x7fd3e4a0e860: Escape>], 'napari:orient_plane_normal_along_x': [<KeyBinding at 0x7fd3e4a0e980: X>], 'napari:orient_plane_normal_along_y': [<KeyBinding at 0x7fd3e4a0eaa0: Y>], 'napari:orient_plane_normal_along_z': [<KeyBinding at 0x7fd3e4a0ebc0: Z>], 'napari:orient_plane_normal_along_view_direction': [<KeyBinding at 0x7fd3e4a0ece0: O>], 'napari:activate_image_pan_zoom_mode': [<KeyBinding at 0x7fd3e4a0ee00: 1>], 'napari:activate_image_transform_mode': [<KeyBinding at 0x7fd3e4a0eef0: 2>], 'napari:activate_vectors_pan_zoom_mode': [<KeyBinding at 0x7fd3e4a0f070: 1>], 'napari:activate_vectors_transform_mode': [<KeyBinding at 0x7fd3e4a0f190: 2>], 'napari:activate_tracks_pan_zoom_mode': [<KeyBinding at 0x7fd3e4a0f2b0: 1>], 'napari:activate_tracks_transform_mode': [<KeyBinding at 0x7fd3e4a0f3d0: 2>], 'napari:activate_surface_pan_zoom_mode': [<KeyBinding at 0x7fd3e4a0f4f0: 1>], 'napari:activate_surface_transform_mode': [<KeyBinding at 0x7fd3e4a0f610: 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.

  • 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.

Double-click Labels polygon completion radius (-1 to always complete)#

Max radius in pixels from first vertex for double-click to complete a polygon; set -1 to always complete.

  • Access programmatically with SETTINGS.experimental.completion_radius.

  • Type: int.

  • Default: -1.

  • 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.

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.