How to multi select the parts for applying Material

Step 1: Locate the “Others” dropdown option. 

Step 2: Select the “Materials” option from the dropdown list.

Step 3: Select the “Toggle Multi-Select” option.

Step 4: Select multiple components on the model by clicking left mouse button.

Step 5: Apply any material to those selected components.

Step 6: View the material applied only on the selected components.