Using TITLE and FOOTNOTE Statements
You can define TITLE and FOOTNOTE statements anywhere in your SAS program. They are global and remain in effect until you cancel them or until you end your SAS session. All currently defined FOOTNOTE and TITLE statements are displayed automatically.
You can define up to ten TITLE statements and ten FOOTNOTE statements in your SAS session. A TITLE or FOOTNOTE statement without a number is equivalent to a TITLE1 or FOOTNOTE1 statement. It is not necessary to use sequential statement numbers—skipping a number in the sequence leaves a blank line.
You can use an unlimited number of text strings and options. Ensure that each option is placed before the text strings that you want it to modify.
The most recently specified TITLE or FOOTNOTE statement of any number completely replaces any other TITLE or FOOTNOTE statement of that number. In addition, it cancels all TITLE or FOOTNOTE statements of a higher number. For example, if you define TITLE1, TITLE2, and TITLE3, then submitting a new TITLE2 statement cancels TITLE3.
The most recently specified TITLE or FOOTNOTE statement of any number completely replaces any other TITLE or FOOTNOTE statement of that number. In addition, it cancels all TITLE or FOOTNOTE statements of a higher number. For example, if you define TITLE1, TITLE2, and TITLE3, resubmitting the TITLE2 statement cancels TITLE3.
title4;
But remember that this cancels all other existing statements of a higher number.
To cancel all current TITLE or FOOTNOTE statements, use the TITLE1; or FOOTNOTE1; statement:
重点看红色部分。

谢啦

那要是想实现只取消某一级的title 或是某一行footnote，要怎么实现啊？

如果是title3 ’ ’  这样，那这一行还是存在的 不过是为空吧，还有别的方法不

使用如下语句的结果并不一样。
1. Title;
2. Title '    ';
注: 语句2的单引号内含有4个空格。

语句1将取消输出标题，语句2则将标题写作四个空格，如果输出到外部文件，这样的差异将会更加明显。

谢谢~
2 其实是想两个引号 中间没空格 当时打错了  这样的话这行标题就会留空吧，那要是就想单独删第三行title呢？