If you have questions about Encryption have a look at End-to-End-encryption for Matrix on Element.
Matrix is an instant messaging protocal, and is accessed by using a client. Analogously to how email is a protocol, and Gmail is a client. Like with email, there are many clients for Matrix. Different people can use different clients to contact each other. A good client to start using Matrix with is Element. You can use the web version of Element at meet.physik.fu-berlin.de, or use other versions of Android Clients, iOS clients or Desktop clients (Windows, MacOS, Linux) or any other Matrix client to matrix.physik.fu-berlin.de
Our Matrix server is not federated with the rest of the Matrix ecosystem, due to unresolved privacy questions, but we are giving access to external collaborators upon request.
When you first log in at meet.physik.fu-berlin.de, you will see something like this
We will now look at all of these in turn.
When you press the button to start a direct message (the plus button in the People tab) labelled with (4). You are presented with If you use Matrix for a bit longer it will be filled with suggestions, but for a new user, it is empty. In the box you can type the name or ZEDAT account of the person you are searching for. Press Go to invite the person to chat.
In this example we get an invite for such a direct message session. It pops up in the space where all our conversations are listed. By clicking on it we can choose whether to join or reject the conversation
At the bottom is the message box where you can enter your messages. To the right of the message box there are five buttons highlighted in red for (from left to right)
Furthermore, there are another four buttons on top of the screen highlighted in red and labelled 2. From left to right:
A room is a group chat. You can create a room by pressing the plus button beside the rooms tab labelled by (3). Here you have the option to choose a room name, and whether the room will be public (searchable) or not. Once the room is created, you can invite individuals to it by pressing on the information button within the room, clicking invite, and then typing in their names.
To create a private room, just give it a name and optionally a topic and press Create Room. At first you will be alone, but you can invite more people via the user list.
But what if you just want to join an exisiting public room. The Explore button (compass icon) (5) has you covered. When you click it you get a window where you can search the list of public rooms by name and room alias.
One such room is ZEDV-Support, where the Physics IT service answers support questions and generally interacts with users. It looks like a direct chat session, only with more people, because that's what it is.
In the Matrix client we provide, you can do more than write simple text (and uploading files and images). You can style your text with Markdown, including Hyperlinks and syntaxhighlighted code. You can also write LaTeX code for math inside dollar signs, e.g.
$\LaTeX$ for inline math and
$$\LaTeX$$ for display math.
Sometimes you have a typo and would like to fix it, with Matrix you can, just press the edit button on the message mouseover.
Have you sent something to the wrong person? You can delete messages via the delete options on the more options (three dots) message mouseover.
One last feature, names tabcomplete. If you start typing
@ followed by the name or username of of a user, a little menu will pop up where you can choose the name by clicking or via the tab key if you are down to a single choice
Other things that tabcomplete are room names (starting with a
#), emojis (starting with a
:) and communities (starting with a
Among these settings are whether and how you want to receive desktop notifications, the theme you want (currently we only have the defaults light and dark), but also how your name is displayed and what your profile picture is.
If you change your name or profile picture, other users will see it right away, but the menu will only show it once you log out and back in.
You can also change your name and avatar on a per-room basis. This works only with commands. To change your name, type
/myroomnick <name>. To change your avatar in the room, use
/myroomavatar, then you will be prompted to choose a file from your computer which will be your new avatar.
You might wonder, “I have a group of people, but we also have a set of topics and a single room for that might be confusing!” That is what spaces are for, they group people and rooms and can have long descriptions. They are a tool to organise rooms and people by topic. When creating a space, you can add existing rooms, direct conversations and users to it. You can always add more rooms and people later and both rooms and people can be members of arbitrarily many spaces, so you can group them however you like.
Unfortunately spaces are currently not searchable, so you will need to be invited to join an existing space. This should become more comfortable soon™️.
Spaces are handled via the sidebar on the far left of your screen. It might look something like this.
This shows the sidebar of an account with two spaces (with initials T and F). Clicking on either of them will narrow the list of direct conversations and rooms to only those that belong to that space. The button at the top will return you to the view where you see all your direct conversations and rooms you are a member of. The bottom at the bottom will create a new space.
When you click to create a new space you will be greeted with a small window
You can create public spaces (that - in the future - will be searchable like public rooms) and private spaces. Private spaces are for closed groups or just for your personal usage to organise rooms just the way you like.
If you click to create a public space you will get this small window
where you can set a name and description for the space. This dialog is the same when creating a private space.
Afterwards you will be offered to create rooms for that space
If you already have rooms that you want to add to the space and don't want to create new ones, you must delete the suggestions so that the Continue button changes to a Skip for now button.
Afterwards you can add other people to your room either by copying an invite link or via the usual dialog to add people to a room.
You can always add rooms and people to your space later.
Finally you will land on the landing page of your space
Here you can add more rooms and people to your space or change its name and description and whether it is public or private (via the settings menu that you can reach via the gear symbol)
You can create private spaces for your groups or projects or just for yourself. That's the first question you will be asked when creatin a private space
If you press Just me here, you will be shown a list of all the rooms you are a member of and you can mark them to be added to your private space.
if you press Me and my teammates you will be shown a dialog to invite people
You must invite them via their usernames or skip this step for now, since for our Matrix instance users will not be able to join via app.element.io
Afterwards you will get the same room creation dialog as for public spaces discussed above, where you need to remove the suggested room names if you don't want to create new rooms to skip that step.
If you later decide you want to share your private space with other people, you can always do that and invite people to it. Since the menu to add rooms to spaces is much nicer for personal use private rooms, this is the recommended way to create private spaces and to later invite more users to it instead of going through the general private space creation.
@followed by their name, use tab to autocomplete.
:followed by the name, choices will pop up.