user: Describe GreasePencilOffsetModifier(Modifier) from the Blender manual or Python API, including usage steps and snippets.

assistant: # GreasePencilOffsetModifier(Modifier)

base classes — [`bpy_struct`](bpy.types.bpy_struct.html#bpy.types.bpy_struct "bpy.types.bpy_struct"), [`Modifier`](bpy.types.Modifier.html#bpy.types.Modifier "bpy.types.Modifier")

*class* bpy.types.GreasePencilOffsetModifier(*Modifier*)
:   invert_layer_filter
    :   Invert layer filter

        Type:
        :   boolean, default False

    invert_layer_pass_filter
    :   Invert layer pass filter

        Type:
        :   boolean, default False

    invert_material_filter
    :   Invert material filter

        Type:
        :   boolean, default False

    invert_material_pass_filter
    :   Invert material pass filter

        Type:
        :   boolean, default False

    invert_vertex_group
    :   Invert vertex group weights

        Type:
        :   boolean, default False

    layer_pass_filter
    :   Layer pass filter

        Type:
        :   int in [0, 100], default 0

    location
    :   Values for change location

        Type:
        :   [`mathutils.Vector`](mathutils.html#mathutils.Vector "mathutils.Vector") of 3 items in [-inf, inf], default (0.0, 0.0, 0.0)

    material_filter
    :   Material used for filtering

        Type:
        :   [`Material`](bpy.types.Material.html#bpy.types.Material "bpy.types.Material")

    material_pass_filter
    :   Material pass

        Type:
        :   int in [0, 100], default 0

    offset_mode
    :   - `RANDOM`
          Random – Randomize stroke offset.
        - `LAYER`
          Layer – Offset layers by the same factor.
        - `STROKE`
          Stroke – Offset strokes by the same factor based on stroke draw order.
        - `MATERIAL`
          Material – Offset materials by the same factor.

        Type:
        :   enum in [`'RANDOM'`, `'LAYER'`, `'STROKE'`, `'MATERIAL'`], default `'RANDOM'`

    open_general_panel
    :   Type:
        :   boolean, default False

    open_influence_panel
    :   Type:
        :   boolean, default False

    rotation
    :   Values for changes in rotation

        Type:
        :   [`mathutils.Euler`](mathutils.html#mathutils.Euler "mathutils.Euler") rotation of 3 items in [-inf, inf], default (0.0, 0.0, 0.0)

    scale
    :   Values for changes in scale

        Type:
        :   [`mathutils.Vector`](mathutils.html#mathutils.Vector "mathutils.Vector") of 3 items in [-inf, inf], default (0.0, 0.0, 0.0)

    seed
    :   Random seed

        Type:
        :   int in [0, inf], default 0

    stroke_location
    :   Value for changes in location

        Type:
        :   [`mathutils.Vector`](mathutils.html#mathutils.Vector "mathutils.Vector") of 3 items in [-inf, inf], default (0.0, 0.0, 0.0)

    stroke_rotation
    :   Value for changes in rotation

        Type:
        :   [`mathutils.Euler`](mathutils.html#mathutils.Euler "mathutils.Euler") rotation of 3 items in [-inf, inf], default (0.0, 0.0, 0.0)

    stroke_scale
    :   Value for changes in scale

        Type:
        :   [`mathutils.Vector`](mathutils.html#mathutils.Vector "mathutils.Vector") of 3 items in [-inf, inf], default (0.0, 0.0, 0.0)

    stroke_start_offset
    :   Offset starting point

        Type:
        :   int in [0, inf], default 0

    stroke_step
    :   Number of elements that will be grouped

        Type:
        :   int in [1, 500], default 1

    tree_node_filter
    :   Layer name

        Type:
        :   string, default “”, (never None)

    use_layer_group_filter
    :   Filter by layer group name

        Type:
        :   boolean, default False

    use_layer_pass_filter
    :   Use layer pass filter

        Type:
        :   boolean, default False

    use_material_pass_filter
    :   Use material pass filter

        Type:
        :   boolean, default False

    use_uniform_random_scale
    :   Use the same random seed for each scale axis for a uniform scale

        Type:
        :   boolean, default False

    vertex_group_name
    :   Vertex group name for modulating the deform

        Type:
        :   string, default “”, (never None)

    *classmethod* bl_rna_get_subclass(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The RNA type or default when not found.

        Return type:
        :   [`bpy.types.Struct`](bpy.types.Struct.html#bpy.types.Struct "bpy.types.Struct") subclass

    *classmethod* bl_rna_get_subclass_py(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The class or default when not found.

        Return type:
        :   type