下划线
Underlines or removes underlining from the selected text.
如果光标不在词中，则为随后输入的新文字加上下划线。
Single Underline
Underlines the selected text with a single line.
Double Underline
Underlines the selected text with two lines.
Collabora Office 21.06 帮助
Underlines or removes underlining from the selected text.
如果光标不在词中，则为随后输入的新文字加上下划线。
Underlines the selected text with a single line.
Underlines the selected text with two lines.