<p>How can I split long commands over multiple lines in a batch file?</p>

You can break up long lines with the caret
```
^
```
as long as you remember that the caret and the newline following it are completely removed. So, if there should be a space where you're breaking the line, include a space.
(
More on that below.
)
Example:
```
```
copy file1.txt file2.txt
```
```
would be written as:
```
```
copy file1.txt^
 file2.txt
```
```