To set general preferences in the Visual Difference/ Visual Merge interface
1. Select > . The Preferences dialog box displays.
2. To configure your toolbar, click Toolbar.
3. Configure the toolbar as desired.
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The toolbar buttons available for configuration vary depending on the mode you are working in.
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4. Under Miscellaneous, set the following options:
◦ To display line numbers in the revisions, select Show Line Numbers. Clear this option if you want to remove line numbers.
◦ To set the tab size, in the Expand tabs to field enter the number of spaces you want tabs expanded to. Changes to tab size do not take effect until the tool is invoked again.
5. Under Collapsed sections, set the following options:
◦ To automatically hide text with no differences when Visual Difference / Visual Merge is first opened, select Collapse unchanged blocks on launch.
◦ To set the number of lines to display above and below collapsed text in order to provide context, in the Show lines of context field enter the number of lines you want displayed.
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If the number of context lines displayed would result in only a single line in the collapsed block, the block is not collapsed.
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6. Click OK to save your changes.