Why are there two dots in some PowerCADD tool icons and Menu items?

Why are there two dots in some PowerCADD tool icons and Menu items?

Here’s why:

Optiontools

Some of the Palette tool icons and menu items contain two dots (..). Selecting these tools while pressing the option key will display a dialog box. The dialog box will allow you to customize the selected tool. If the option key is not held, no dialog box will appear and the desired tool will be selected utilizing the last dialog settings.

Optionmenus