Aglaonema Pictum Tricolor is generally low-maintenance and does not require pruning. However, if you notice any dead or yellowing leaves or if you want to encourage new growth, you can prune it using the following steps: 1. Sterilize your pruning tool, preferably with rubbing alcohol, to avoid transmitting any diseases to the plant. 2. Select the stems that you want to prune and cut them just above a node, a point where leaves emerge. 3. If there are any yellow or dead leaves, cut them off close to the stem. 4. Once you have finished pruning, dispose of the cuttings properly and maintain good hygiene to prevent any infections or diseases. 5. After pruning, ensure that the plant is sufficiently watered without being over-watered. Regular pruning will also help control the size and shape of the plant, but it is not necessary if it is not outgrowing its pot or its space.