# Nla Operators

`bpy.ops.nla.``action_pushdown`(channel_index=-1)

  Push action down onto the top of the NLA stack as a new strip

  Parameters: | channel_index (int in [-1, inf], (optional)) – Channel Index, Index of NLA action channel to perform pushdown operation on

`bpy.ops.nla.``action_sync_length`(active=True)

  Synchronize the length of the referenced Action with the length used in the strip

  Parameters: | active (boolean, (optional)) – Active Strip Only, Only sync the active length for the active strip

`bpy.ops.nla.``action_unlink`(force_delete=False)

  Unlink this action from the active action slot (and/or exit Tweak Mode)

  Parameters: | force_delete (boolean, (optional)) – Force Delete, Clear Fake User and remove copy stashed in this datablock’s NLA stack

`bpy.ops.nla.``actionclip_add`(action='')

  Add an Action-Clip strip (i.e. an NLA Strip referencing an Action) to the active track

  Parameters: | action (enum in [], (optional)) – Action

`bpy.ops.nla.``apply_scale`()

  Apply scaling of selected strips to their referenced Actions

`bpy.ops.nla.``bake`(frame_start=1, frame_end=250, step=1, only_selected=True, visual_keying=False, clear_constraints=False, clear_parents=False, use_current_action=False, bake_types={'POSE'})

  Bake all selected objects loc/scale/rotation animation to an action

  Parameters: | frame_start (int in [0, 300000], (optional)) – Start Frame, Start frame for baking frame_end (int in [1, 300000], (optional)) – End Frame, End frame for baking step (int in [1, 120], (optional)) – Frame Step, Frame Step only_selected (boolean, (optional)) – Only Selected Bones, Only key selected bones (Pose baking only) visual_keying (boolean, (optional)) – Visual Keying, Keyframe from the final transformations (with constraints applied) clear_constraints (boolean, (optional)) – Clear Constraints, Remove all constraints from keyed object/bones, and do ‘visual’ keying clear_parents (boolean, (optional)) – Clear Parents, Bake animation onto the object then clear parents (objects only) use_current_action (boolean, (optional)) – Overwrite Current Action, Bake animation into current action, instead of creating a new one (useful for baking only part of bones in an armature) bake_types (enum set in {'POSE', 'OBJECT'}, (optional)) – Bake Data, Which data’s transformations to bake `POSE` Pose, Bake bones transformations. `OBJECT` Object, Bake object transformations.
  File: | startup/bl_operators/anim.py:261

`bpy.ops.nla.``channels_click`(extend=False)

  Handle clicks to select NLA channels

  Parameters: | extend (boolean, (optional)) – Extend Select

`bpy.ops.nla.``clear_scale`()

  Reset scaling of selected strips

`bpy.ops.nla.``click_select`(wait_to_deselect_others=False, mouse_x=0, mouse_y=0, extend=False, deselect_all=False)

  Handle clicks to select NLA Strips

  Parameters: | wait_to_deselect_others (boolean, (optional)) – Wait to Deselect Others mouse_x (int in [-inf, inf], (optional)) – Mouse X mouse_y (int in [-inf, inf], (optional)) – Mouse Y extend (boolean, (optional)) – Extend Select deselect_all (boolean, (optional)) – Deselect On Nothing, Deselect all when nothing under the cursor

`bpy.ops.nla.``delete`()

  Delete selected strips

`bpy.ops.nla.``duplicate`(linked=False, mode='TRANSLATION')

  Duplicate selected NLA-Strips, adding the new strips in new tracks above the originals

  Parameters: | linked (boolean, (optional)) – Linked, When duplicating strips, assign new copies of the actions they use mode (enum in ['INIT', 'DUMMY', 'TRANSLATION', 'ROTATION', 'RESIZE', 'SKIN_RESIZE', 'TOSPHERE', 'SHEAR', 'BEND', 'SHRINKFATTEN', 'TILT', 'TRACKBALL', 'PUSHPULL', 'CREASE', 'MIRROR', 'BONE_SIZE', 'BONE_ENVELOPE', 'BONE_ENVELOPE_DIST', 'CURVE_SHRINKFATTEN', 'MASK_SHRINKFATTEN', 'GPENCIL_SHRINKFATTEN', 'BONE_ROLL', 'TIME_TRANSLATE', 'TIME_SLIDE', 'TIME_SCALE', 'TIME_EXTEND', 'BAKE_TIME', 'BWEIGHT', 'ALIGN', 'EDGESLIDE', 'SEQSLIDE', 'GPENCIL_OPACITY'], (optional)) – Mode

`bpy.ops.nla.``fmodifier_add`(type='NULL', only_active=True)

  Add F-Modifier to the active/selected NLA-Strips

  Parameters: | type (enum in ['NULL', 'GENERATOR', 'FNGENERATOR', 'ENVELOPE', 'CYCLES', 'NOISE', 'LIMITS', 'STEPPED'], (optional)) – Type `NULL` Invalid. `GENERATOR` Generator, Generate a curve using a factorized or expanded polynomial. `FNGENERATOR` Built-In Function, Generate a curve using standard math functions such as sin and cos. `ENVELOPE` Envelope, Reshape F-Curve values - e.g. change amplitude of movements. `CYCLES` Cycles, Cyclic extend/repeat keyframe sequence. `NOISE` Noise, Add pseudo-random noise on top of F-Curves. `LIMITS` Limits, Restrict maximum and minimum values of F-Curve. `STEPPED` Stepped Interpolation, Snap values to nearest grid-step - e.g. for a stop-motion look. only_active (boolean, (optional)) – Only Active, Only add a F-Modifier of the specified type to the active strip

`bpy.ops.nla.``fmodifier_copy`()

  Copy the F-Modifier(s) of the active NLA-Strip

`bpy.ops.nla.``fmodifier_paste`(only_active=True, replace=False)

  Add copied F-Modifiers to the selected NLA-Strips

  Parameters: | only_active (boolean, (optional)) – Only Active, Only paste F-Modifiers on active strip replace (boolean, (optional)) – Replace Existing, Replace existing F-Modifiers, instead of just appending to the end of the existing list

`bpy.ops.nla.``make_single_user`()

  Ensure that each action is only used once in the set of strips selected

`bpy.ops.nla.``meta_add`()

  Add new meta-strips incorporating the selected strips

`bpy.ops.nla.``meta_remove`()

  Separate out the strips held by the selected meta-strips

`bpy.ops.nla.``move_down`()

  Move selected strips down a track if there’s room

`bpy.ops.nla.``move_up`()

  Move selected strips up a track if there’s room

`bpy.ops.nla.``mute_toggle`()

  Mute or un-mute selected strips

`bpy.ops.nla.``previewrange_set`()

  Automatically set Preview Range based on range of keyframes

`bpy.ops.nla.``select_all`(action='TOGGLE')

  Select or deselect all NLA-Strips

  Parameters: | action (enum in ['TOGGLE', 'SELECT', 'DESELECT', 'INVERT'], (optional)) – Action, Selection action to execute `TOGGLE` Toggle, Toggle selection for all elements. `SELECT` Select, Select all elements. `DESELECT` Deselect, Deselect all elements. `INVERT` Invert, Invert selection of all elements.

`bpy.ops.nla.``select_box`(axis_range=False, tweak=False, xmin=0, xmax=0, ymin=0, ymax=0, wait_for_input=True, mode='SET')

  Use box selection to grab NLA-Strips

  Parameters: | axis_range (boolean, (optional)) – Axis Range tweak (boolean, (optional)) – Tweak, Operator has been activated using a tweak event xmin (int in [-inf, inf], (optional)) – X Min xmax (int in [-inf, inf], (optional)) – X Max ymin (int in [-inf, inf], (optional)) – Y Min ymax (int in [-inf, inf], (optional)) – Y Max wait_for_input (boolean, (optional)) – Wait for Input mode (enum in ['SET', 'ADD', 'SUB'], (optional)) – Mode `SET` Set, Set a new selection. `ADD` Extend, Extend existing selection. `SUB` Subtract, Subtract existing selection.

`bpy.ops.nla.``select_leftright`(mode='CHECK', extend=False)

  Select strips to the left or the right of the current frame

  Parameters: | mode (enum in ['CHECK', 'LEFT', 'RIGHT'], (optional)) – Mode extend (boolean, (optional)) – Extend Select

`bpy.ops.nla.``selected_objects_add`()

  Make selected objects appear in NLA Editor by adding Animation Data

`bpy.ops.nla.``snap`(type='CFRA')

  Move start of strips to specified time

  Parameters: | type (enum in ['CFRA', 'NEAREST_FRAME', 'NEAREST_SECOND', 'NEAREST_MARKER'], (optional)) – Type

`bpy.ops.nla.``soundclip_add`()

  Add a strip for controlling when speaker plays its sound clip

`bpy.ops.nla.``split`()

  Split selected strips at their midpoints

`bpy.ops.nla.``swap`()

  Swap order of selected strips within tracks

`bpy.ops.nla.``tracks_add`(above_selected=False)

  Add NLA-Tracks above/after the selected tracks

  Parameters: | above_selected (boolean, (optional)) – Above Selected, Add a new NLA Track above every existing selected one

`bpy.ops.nla.``tracks_delete`()

  Delete selected NLA-Tracks and the strips they contain

`bpy.ops.nla.``transition_add`()

  Add a transition strip between two adjacent selected strips

`bpy.ops.nla.``tweakmode_enter`(isolate_action=False)

  Enter tweaking mode for the action referenced by the active strip to edit its keyframes

  Parameters: | isolate_action (boolean, (optional)) – Isolate Action, Enable ‘solo’ on the NLA Track containing the active strip, to edit it without seeing the effects of the NLA stack

`bpy.ops.nla.``tweakmode_exit`(isolate_action=False)

  Exit tweaking mode for the action referenced by the active strip

  Parameters: | isolate_action (boolean, (optional)) – Isolate Action, Disable ‘solo’ on any of the NLA Tracks after exiting tweak mode to get things back to normal

`bpy.ops.nla.``view_all`()

  Reset viewable area to show full strips range

`bpy.ops.nla.``view_frame`()

  Reset viewable area to show range around current frame

`bpy.ops.nla.``view_selected`()

  Reset viewable area to show selected strips range