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+Envoy Client can be used as a `pseudo-command line interface(CLI)` messenger:
+
+You have the option to perform most actions by entering an `activator` as the first visible letter where you type new messages. <br>
+If an activator is found (case insensitive), the word starting exactly behind it will be executed (that's a `system command`).<br>
+A system command may need parameters to work, those have to be separated by a space.<br>
+If not enough parameters have been given, default parameters will be supplied. In some cases however, they'll only ask you to enter one yourself.<br>
+If the necessary parameters behind this system command have the correct format, the system command will be executed.<br>
+If there are more parameters than necessary, the remaining ones will be ignored.<br>
+If a system command has been executed, it will not be sent as a message (others won't know that you entered a system command).
+<p>
+
+The default activator is `/`. 
+It is planned that in the future this activator might be customizable according to your preferences.
+
+## Current system commands are:
+
+| Command                            | Parameters            | Default values | Action                                          |
+| ---------------------------------- | --------------------- | -------------- | ----------------------------------------------- |
+| `error`                            | `none`                | `none`         | Displays an error message                       |
+| `dabr`                             | 0: int - the number of rotations,<br>1: float - the amount of time `it` rotates | 0: 1-4, 1: 1-4s                              | Short for "Do a barrel roll". But see for yourself                                       |
+| `logout`                           | `none`                | `none`         | Logs the current user out                       |
+| `q` / `exit`                       | `none`                | `none`         | Closes Envoy (or minimizes it, depending on the settings option chosen)                                                                                                         |
+| `settings`                         | `none`                | `none`         | Opens the settings screen                       |
+| `status`                           | 0: either `offline`, `away`, `busy` or `online` (case insensitive) | `none` | Changes your status to the given status                                                                                                      |
+
+#### message dependant commands (**ADVANCED**):
+
+The following commands require a message to be parsed from the first parameter.
+There are two ways how to aquire the message here (x is here a whole number):
+1. "absolute": The x-th message from the top - i.e. using 3 as argument will use the third highest completely visible message
+2. "relative": using `s+-x` will use the message +-x below the currently selected message - i.e. s+5 will use the message that is 5 messages below the currently selected one. Note: `++s`/ `s++` (= `s+1` ) and `--s`/ `s--` (= `s-1` ) are also possible.
+<p>
+If the parameter is not given, the currently selected message will be used.
+
+| Command    | Additional Parameters | Action                       |
+| `s`        | `none` | Selects the given message                   |
+| `cp`       | `none` | Copies the text of the given message        |
+| `del`      | `none` | Deletes the given message locally           |
+| `save-att` | `none` |  Saves the attachment of the given message if present (either directly or by asking you where, depending on your settings)                                                   |
+
+### Examples
+
+(Assuming default activator is the activator(`/`)):
+
+`/error xyz abc test`<br>
+`/DaBr`<br>
+`/dabr 3 1.536`<br>
+`/logout`<br>
+`/s s++`<br>
+`/cp 3`<br>
+`/del --s`<br>
+`/save-att s--`<br>
+`/s 0`<br>
+
+### Notation
+* `int` refers to a whole number
+* `float` refers to a decimal number where `.` is used as the separator between the whole number and the fraction