A few users have reported that they cannot add a Pen path or move vertices of existing paths. Please check the following settings:
- Verify that your system meets the minimum requirements for Lightform Creator.
- If you are on a computer that has a dual GPU (dedicated and integrated), ensure that your dedicated GPU is being used to run Lightform Creator. For example, on a Dell XPS with both an NVIDIA GPU and Intel Integrated GPU, you can right-click the Lightform Creator tray icon and choose "Run with graphics processor" then ensure that "High-performance NVIDIA processor" is selected and run Lightform Creator again (other systems may vary).
For reference, the Pen Tool should behave like this: