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Part II: Appreciating Web Design Options in Java
Part II: Appreciating Web Design Options
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2 Choose Tag from the Selector Type drop-down list 3 Choose the HTML tag you want to redefine from the Selector Name drop-down list You can also type to enter the name of a tag into the Selector Name field In this example, I selected h1 to redefine the H1 heading tag
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Figure 5-23: Use the tag selector to redefine an existing HTML tag, such as the <h1> tag
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4 From the Rule Definition drop-down list, choose the This Document Only option to create the new style in an internal style sheet If you prefer, you can choose the New Style Sheet File option to create a new external style sheet as you create the style, or you can use the drop-down list to select any existing style sheet already attached to the page and add the new style to it An internal style sheet applies only to the current page When you select this option, the style is created and added to the top of the open HTML page in the <head> section 5 Click OK The CSS Rule definition dialog box opens 6 Choose a category and specify the options you want to use to redefine the new tag style For this example, I redefined the <h1> tag to use the Georgia font instead of the default browser font, changed the size to extra large, and changed the text color to dark green 7 Click OK Any text or other element that you ve already formatted with the HTML tag immediately changes to reflect the formatting in the new tag style definition
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5: Cascading Style Sheets
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If you want to be able to use the same HTML tag with different style definitions, you can create compound styles, as described in 6 See Understanding style selectors earlier in this chapter for an introduction to the different types
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Editing an existing style
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You can change the attributes of any style after you create it by editing its style definitions This is where some of the biggest advantages of Cascading Style Sheets come into play You can make global changes to a page or even to an entire Web site by changing a style because when you edit the style, the changes are automatically applied to every element where you used the style This is one of the reasons that external style sheets are so valuable because you can create styles that are used on any or all the pages in a site Beware, however, that this can also lead to problems If you decide that you want to edit a style when you use it on a new page, don t forget that you ll be changing the formatting everywhere else you ve already used that style In some cases, you may be better off creating new styles, rather than editing old styles You can create new styles by duplicating an existing style, giving it a new name, and then altering the style definitions This is a time-saving trick when you want to create a new style that is similar to an existing one To edit an existing style, follow these steps: 1 Open the CSS Styles panel by choosing Window CSS Styles 2 Select the name of an existing style in the CSS panel The corresponding definition settings are displayed in the Properties pane below it 3 Select any of the settings in the Properties pane and edit them Alternatively, you can double-click the name of any style in the CSS Styles panel to launch the CSS Rule Definition dialog box and edit the style there If you edit a style definition in the Properties panel, the changes are applied automatically as soon as you press the Return or Enter key or click outside the formatting field in the panel If you edit a style in the CSS Rule Definition dialog box, changes are applied automatically when you click the Apply button 4 Click OK to apply the changes and close the dialog box
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