Contents

# Password

Assigns a password to prevent users from making unauthorised changes.

You should only use passwords that are hard to find by other persons or programs. A password should follow these rules:

- Length of eight or more characters.

- Contains a mix of lower-case and upper-case letters, numbers, and special characters.

- Cannot be found in any wordbook or encyclopaedia.

- Has no direct relation to your personal data, e.g., date of birth or car plate.

The open password must be entered to open the file.

The permission password must be entered to edit the document.

## Password

Type a password. A password is case-sensitive.

## Confirm

Re-enter the password.

## Undoing password-protection

To remove a password, open the document, then save without password.

## PDF Passwords

Due to the limitations of the PDF file format, PDF passwords used to protect exported PDF files can contain only the following characters:

- ASCII digits: from “0” to “9”

- Upper-case Latin alphabet: from “A” to “Z”

- Lower-case Latin alphabet: from “a” to “z”

- ASCII punctuation and symbols:

Character | Description
--- | ---
| Space
! | Exclamation mark
" | Quotation mark
# | Number sign
$ | Dollar sign
% | Percent sign
& | Ampersand
' | Apostrophe
( | Left parenthesis
) | Right parenthesis
* | Asterisk
+ | Plus sign
, | Comma
- | Hyphen-minus
. | Period
/ | Slash
: | Colon
; | Semicolon
< | Less-than sign
= | Equal sign
> | Greater-than sign
? | Question mark
@ | At sign
[ | Left Square Bracket
\ | Backslash
] | Right Square Bracket
^ | Circumflex accent
_ | Low line
` | Grave accent
{ | Left Curly Bracket
| | Vertical bar
} | Right Curly Bracket
~ | Tilde