Various aspects can be customized using preferences. To open the preferences dialog select Window > Preferences > WireframeSketcher.
The main page lets you to enter your license key if you have one. Here you’ll also find the Report a Bug button which helps you to email bug reports with all the necessary information.
The Screen Editor subpage is where you can customize the snapping behavior, the visibility of the rulers and grid, and the grid size.
The Theme subpage lets you customize the default look of your wireframes, either clean or sketchy.
Next: SWT Spy Plugin