- 檔案 → 選項 → 郵件 → 郵件格式
- 取消勾選"移除顯示郵件時不需要的格式資訊,以減少郵件大小"
1. Window → Preferences
2. Java → Editor → Content Assist
3. 勾選"Enable auto activation"
- Auto activation delay: 0
- Auto activation triggers for Java: .abcdefghijklmnopqrstuvwxyz(,
1. Window → Preferences
2. General → Editors → Text Editor
3. 勾選"Show line numbers"