# Introduction This lab is a step-by-step tutorial on how to build cross-GUI applications using Matplotlib event handling to interact with objects on the canvas. We will be creating a polygon editor that allows you to move, delete, and insert vertices. ## VM Tips After the VM startup is done, click the top left corner to switch to the **Notebook** tab to access Jupyter Notebook for practice. Sometimes, you may need to wait a few seconds for Jupyter Notebook to finish loading. The validation of operations cannot be automated because of limitations in Jupyter Notebook. If you face issues during learning, feel free to ask Labby. Provide feedback after the session, and we will promptly resolve the problem for you.
Click the virtual machine below to start practicing