Dynamic Relationships Editor

Window > Relationship Editors > Dynamic Relationships.

You can use the Dynamic Relationships Editor to connect and disconnect dynamic relationships between dynamic objects, such as particles, nParticles, and fluids, and fields, emitters, and collision objects. Using the Dynamic Relationships Editor provides a quick and easy method for viewing and changing the node connections of the dynamic objects in your scene. For example, you can disconnect a Radial field from a particle object without deleting the Radial field node. Using the Dynamic Relationships Editor, you can do the following:

Connect and disconnect Maya fields to and from objects such as particles, fluids, nParticles, and nCloth.
Connect and disconnect particle emitters to and from particle (particleShape node) and nParticle (nParticleShape node) objects and fluid emitters to and from fluid (fluidShape node) objects.
Reassign collisions between dynamic objects. An object must be a dynamic active or passive rigid body, and have been assigned as a collision object to a hair, fluid, or classic particles objects to be edited using the Dynamic Relationships Editor.
Nucleus-based relationships, such as collisions between nCloth, nParticles, or passive collision objects, cannot be edited using the Dynamic Relationships Editor.
Connect and Disconnect fluid objects to and from collision geometry.

In the left panel of the Dynamic Relationships Editor, you can select multiple objects, then view each object's connections in the right panel. You can then edit the dynamic relationships individually.

You can display the Dynamic Relationships Editor as a separate window or as a panel in the workspace.

Menus

Solver: Allows you to either view only those objects assigned to a specific Nucleus solver, or view all the objects assigned to Nucleus solvers.

Selection modes

Fields: Displays the Maya fields that you can connect to or disconnect from the object(s) selected in the left panel.
Collisions: Displays the geometry that already has collisions set up. You can connect to selected object(s) so that they collide, or disconnect from the selected object(s) so that they no longer collide.For geometry that does not have collisions set up, you need to select Make Collide from the appropriate Dynamics menu before using the Dynamics Relationship Editor to connect or disconnect collisions.

Nucleus-based relationships, such as collisions between nCloth, nParticle, or passive collision objects, cannot be edited using the Dynamic Relationships Editor.
Emitters: Displays the fluid, particle, and nParticle emitters that can be connected to or disconnected from object(s) selected in the left panel of the editor.
All: Displays the fields, collisions, and emitters that can be connected to or disconnected from the object(s) selected in the left panel of the editor.