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3. Editing multiple files

It is often useful to edit more than one file at a time.

Quit from vim:
```
:q!
```
Let's create another test file:
```
ls -l /usr/bin > ls-output.txt
```
Start vim with both test files as argument:
```
vim foo.txt ls-output.txt
```
To see the list of buffers (opened files):
```
:buffers
```
To switch to the next buffer press :bn. Try it a few times

To switch to the previous buffer press :bp. Try it a few times.

We can also switch to another buffer like this:
```
:buffer 2
```
```
:buffer 1
```
It's also possible to add files to the current editing session.
```
:q!
```
```
vim foo.txt
```
```
:e ls-output.txt
```
```
:buffers
```
While editing multiple files, it is possible to copy a portion of one file into another file that we are editing. This is easily done using the usual yank and paste commands.

:buffer 1

1G and yy

:buffer 2

1G and p

:q!
It's also possible to insert an entire file into one that we are editing.
```
vim ls-output.txt
```
```
3G
```
```
:r foo.txt
```
```
:w foo1.txt
```
We saved the buffer to the file foo1.txt, but we are still editing the first file and any further modifications will be done to it.
```
:q!
```

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