I am so confused about:
What are in the dashboard on the left side the OWNERS (or what it is, e.g. my name or a team-name), in the second hirarchies are PROJECTS and within a projects are the BOARDS.
I have no clue, who has access to what. I can look in the permissions etc. but it looks like there is no contro and it all happens randomly.
What I want: We have a Team-plan with 5 people. I want to be sure, that ONLY  I myself have access to my own project. 
In “ALL BOARDS” there are all boards from other projects as well. And I have access to all boards of all 5 teammembers. so I guess, that the others can also see my projects and boards

Please help!
thanks

@Achim S. - What type of plan are your 5 team members are a part of? Free, Team, Consultant, or Education? You mentioned having Projects, so I will assume you have a paid plan and probably the Team plan. However, if you are on the the Free Plan, there are no private boards - all team members can see all boards. All you can do then is limit who can edit and only view them.

While I wait for you to answer, check out the Projects Help Center article - it explains the Teams → Projects → Boards hierarchy.

Here’s some more info (that I will one day put together into one post that explains accounts/teams/members/boards/projects etc.).

Miro Account Profiles

Everyone who creates a Miro account has an account profile (this is unique by email address). That account profile can then be added to an unlimited number of teams. These teams would all show up on the left-hand, vertical bar in the dashboard, e.g., my account profile is a member of ten teams:

Default Board and Project permission settings

I just finished sending this information to someone else. Essentially what you'll want to do in your Team profiling settings is to set the default sharing for newly created Boards and Projects so that only the creator can access them. This is important for a number of reasons, including:

1. Only the person creating the board/project can see it and therefore it remains private until it is explicitly shared with someone(s); and
2. it avoids "clutter" in people's dashboards (imagine you add, say, 50 students and each of them creates two projects and three boards!

To set this up:

1. From your dashboard, click on the team settings gear icon
2. Click on Permissions
3. Scroll down to Sharing settings
4. Set "Default settings for board sharing" and "Project sharing settings" to Only board/project owners can access:

I thought that perhaps Miro may have already changed the default settings to the above, however from what you’re telling me, it doesn’t appear they have.

Projects (and using them like “folders”)

You can set a folder to be visible or hidden to other team members. If hidden, any boards in that project will also be hidden, UNLESS you have either added members to the project OR you have added a member at the board level (more on that later):

Use case:

• You need to work on a few boards with Tim and Sally on an initiative called “Marketing team system upgrade”, so you create a project called Marketing team system upgrade
• You then open that project and make use “Anyone in your team can view this project” is DISABLED
• You click on Add members and add Tim and Sally and give them Edit access.
• Now Tim and Sally will see that project in their Miro dashboard and any boards that you add to that project.
• If a new team member needs to work on those boards with you, Tim, and Sally, you just add them to the project and now they can see all of those boards.

Another use case: You may a project called Achim, set “Anyone in your team can view this project” is DISABLED, and keep your private boards in their. Except there is one board in there that your manger needs to see, so you open that board, select Share, and add your manager here:

Board Sharing permissions

Before I try to answer all of your questions, I will break down the Free Plan roles and types of access to a board in the Free Plan and moving forward I will simply refer to these and Team and Public. You can find these settings in a board’s Share settings from either inside of the board or by using the ellipsis “three-dots” menu:

First, let’s talk about the options available at the Team level:

1. Can view - Any member of the Free Plan team (either Team Admin or Member - the only two roles) can view the board in read-only mode - they will not be able to edit it - only the board owner (the person who created the board) will still be able to edit the board.

2. Can comment - Now any team member can view the board, add new comments to objects that did not already have comments, as well as add additional comments to existing comments.

3. Can edit -  This is the default setting of newly created boards in a Free Plan.

4. No access - aka, Private Boards ← as this Miro Help Center article states, and as does the help bubble in the above screenshot, private boards are not allowed in the Free Plan.

Public board access:

NOTE: “Anyone” really means anyone - they don’t even need to have a Miro account:

1. Can view - Again, anyone with the link can only view the board.

2. Can comment - Similar to the Team-level setting, anyone with the link can create & add new comments.

3. Can edit - This option is not available for Free Plans. Only team members can edit the board. Public edit access to a Miro board is for paid plans only. This feature is commonly referred to as Guest Editor access - check out this article → Collaboration with Anonymous Guest Editors. It is also worth noting that paid plans can also password protect public boards.

No access - This is the default setting and as it sounds means there is no public access allowed to the board.

Keep your questions coming!

Hi,
I have a TEAM-plan.

Thanks for your detailled answer. It is so long, that I need more time to read it.
First feedback: 
I really appreciate your answer and all this makes probably a lot of sense. I just wonder, why it appears so complicated and why it needs so much text for a relatively important issue like ACCESS and WHO can see WHAT. It should be much more obvious without studying tons of options.

Thanks again. I will read it. maybe it will be simple after I undrstood it

@Achim S. 

I just wonder, why it appears so complicated and why it needs so much text for a relatively important issue like ACCESS and WHO can see WHAT. 

I’ll admit that I am a very analytical type and do like to dig deep to figure out and understand things. I’d really like to believe that I am just not overthinking all of this. But at the same time, with all of flexibility that Miro offers with their many configuration options/terms/roles/access, I also believe that it’s not always obvious. Of course, your question was likely rhetorical as there was no “?” at the end 

I like a logical type.
Just when I watch the MIRO video, it mostly shows the BUTTONS when you are already IN a feature (e.g. how to do the settings of a project), but not how you get there. I am busy the last 30min and still dont know it

@Achim S. - Getting to a project’s settings requires two steps:

1. Select/open the project
2. Click on the project name: