IntelliJ光标置于方法/变量名时不高亮所有引用，如何恢复？

Hey there! I’ve dealt with this exact frustration before—nothing’s more annoying than losing that handy reference highlighting. Let’s go through the most common fixes, starting with the simplest ones:

Quick Toggle Check #

First, make sure you didn’t accidentally turn off the feature with a keyboard shortcut:

• Windows/Linux: Press Ctrl+Shift+F7 to toggle the highlight on/off.
• Mac: Press Cmd+Shift+F7 for the same toggle.
• You can also check via the menu: Go to Edit > Find > Highlight Usages of Element at Caret—if it’s not checked, click it to enable.

Verify Color Scheme Settings #

Sometimes the highlight is enabled but the color matches your background, making it invisible:

1. Open Settings (Windows/Linux: File > Settings; Mac: IntelliJ IDEA > Settings).
2. Navigate to Editor > Color Scheme > General.
3. In the right pane, scroll down to the Identifier under caret section.
   • Ensure the Enabled box is checked.
   • Adjust the Foreground or Background color to something that stands out against your theme (e.g., a light blue background or bold text).

Check for Plugin Conflicts #

Third-party plugins can sometimes interfere with core IDE features:

1. Restart IntelliJ in Safe Mode (go to File > Safe Mode). This disables all non-built-in plugins.
2. Test the highlight feature—if it works now, the issue is with a plugin.
3. Exit Safe Mode, then disable plugins one by one (go to Settings > Plugins) and restart after each to find the culprit.

Invalidate Caches #

Corrupted IDE cache is a common culprit for weird behavior:

1. Go to File > Invalidate Caches....
2. Select Invalidate and Restart from the popup. This will clear cached data and restart the IDE.
3. Once it’s back up, test the highlight feature again.

Restore Default Settings (Last Resort) #

If none of the above work, resetting your IDE settings might fix it (note: this will erase all customizations, so back up first if needed):

1. Back up your settings: File > Manage IDE Settings > Export Settings.
2. Restore defaults: File > Manage IDE Settings > Restore Default Settings.
3. Restart the IDE and re-enable the highlight feature via the steps above.

内容的提问来源于stack exchange，提问作者nadavgam