You can also have a choice preselected when the page loads by using the 'Initially Selected' field of the Properties Toolbar. Here is an example where Flash was selected:
Now let's look at Lists. Click on the list button of the Properties Toolbar. You'll notice that the 'height' field and some others are no longer grayed out. The default height is 1, which is essentially the same as a Menu. It becomes a list when the height is changed. Here is a sample with the height set to 5.
Now all selections are visible. You can change the way the field is displayed by changing the height of the List. What if you wanted a visitor to choose between 20 values? You wouldn't want a list that was 20 lines high. For this you could keep the height at 5, or however many lines you prefer, but enter the extra values. This is what happens.
Now a scrollbar appears. You can also allow visitors to select multiple values by clicking on the 'Allow Multiple' checkbox of the Properties Toolbar:
What Tools Do You Regularly Use? (hold down the CTRL or Command key to check multiple values)
