How to disable styles
In the local toolbar, click the Options button and select Disable Styles.
The Disable Styles dialog opens.
On the right side of the dialog, select the styles that you want to disable. You can hold down the SHIFT or CTRL key and click, selecting a range of styles or many individual styles not next to each other.
Click
.
The selected styles are moved to the left side of the dialog
Click OK.
The style classes are removed from view in the style sheet.
Warning Even if you have some styles that you never modify, you may want to avoid disabling them in your style sheet. The reason for this is that disabling a style in a style sheet also disables its use in the rest of the interface. For example, let's say that you have inserted several pictures in your project. When you do this, an <img> tag is used. Therefore, although you may never edit the style properties for the <img> tag, you still require it in order to insert images in the future. Otherwise, features such as the Insert>Picture option become disabled in the interface. The bottom line is that you should use caution when disabling styles, making sure that you truly will not need to use those styles.