Using Bitmap References as Jumps or Popup Windows

You can do more with bitmaps in your title than simply display them. Viewer allows you to use bitmaps as hot spots. This means you can create graphics, such as buttons, and use them in the following ways:

As jumps to particular topics

As hot spots for popup windows

·To code a bitmap reference as a jump:

1.Enter the bmc, bml, bmr, bmcwd, bmlwd, or bmrwd reference in the topic file.

2.Select the entire bitmap reference, including the bitmap filename and surrounding braces.

3.From the Format menu, choose Character and select the Double Underline check box, then cancel the selection of the reference.

4.From the Format menu, choose Character again and clear the Double Underline check box, then select the Hidden check box.

5.Type the context string assigned to the topic.

6.From the Format menu, choose Character again and clear the Hidden check box.

·To code a bitmap reference as a popup window:

1.Create the topic that will appear in the popup window.

2.Create a context-string footnote for the popup window topic.

3.Display the topic from which you want to display the popup window. Enter the bmc, bml, bmr, bmcwd, bmlwd, or bmrwd reference in this topic.

4.Select the entire bitmap reference, including the bitmap filename and surrounding braces.

5.From the Format menu, choose Character and select the Underline check box, then cancel the selection of the reference.

6.From the Format menu, choose Character again and clear the Underline check box, then select the Hidden check box.

7.Type the context string assigned to the popup window topic.

8.From the Format menu, choose Character again and clear the Hidden check box.

Summary: Example

In the following example, the bitmap 3POP.BMP is coded so that, when clicked, it displays the Population topic for Texas (which has context string “tx_population”):

tx_population

Using bm bitmap references is the easiest way to include bitmaps in your title. Viewer also provides other ways to display bitmaps and fine-tune their appearance. Chapter 7, “Advanced Bitmap Techniques,” describes these methods in detail.