The PowerDesigner plugin for Eclipse provides options to customize your environment.
Preference
Description
Close diagram editors on exit
By default, when you restart Eclipse, any diagrams that were previously open will be automatically reloaded. Select this option to prevent reloading.
Flag diagram editor as dirty if parent model requires save
Select this option if you want to be reminded that a model has been modified before you save the changes.
Automatically merge models on code-to-model synchronization
Select this option if you want the merge process to be silent during reverse engineering.
For information about the standard PowerDesigner options and preferences, see Customizing Your Modeling Environment.