Umbrella tree is overgrown and neglected.
How Do I Trim an Umbrella Tree?
Certified GKH Gardening Expert
Assuming you are referencing the schefflera umbrella plant, pruning a is simple. Just cut off what you feel is overgrown or leggy back to a size or shape you like. Schefflera houseplants rebound quickly from pruning and will look even fuller and more lush shortly after pruning.