This also works for Starting a new conversation, so the steps will pretty much be the same.
Step 1, click on your name that is displayed next to the Community.flag
A menu will show up that looks like this

Then click on the red-marked section and you will be redirected to your inbox.
Then You either chose whenever you want to start a Private message, or a New Disscussion

Once you made up your decision, The receivers name goes to "to"
"Subject" Will be the name of the message,
"Message" will be the Message itself.

Its pretty easy, note that you can only edit your own post.
Click on either your name or the profile and a menu will show up

Note how Example is spelled wrong on the picture, so Obviously the goal might be to fix that. Click on Edit and from there you will be able to edit it.

The post will be changed, and a small message below it will say when the changes were made. If it is not obvious enough, the pictures were edited.Oh, and the menu will also close, which kind of does not happen on the edited Picture.

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The report feature is on the very same screen like the edit button is.(Its on the first screenshot for this Tab)

This is basicly what I used to seperate messages and the tutorials from each other so its not one big mess. alternative you can use (hr) (< use [] instead of () ) but I decided to stick with the Tables for reasons.
Tables work like the following, to make a Tab you need to use [] and put an # inbetween it.
Should look like this , Now put a message after the #, the Message after the # Will be the overhead message for the Tab, so chose something descriptive but short. will be chosen as the example.
A tab needs an end,otherwise the entire message below it will be marked as 1 big Tab, which is not what we want. to mark the end of a Tab add a / infront of the #, which would should look like this
Make sure to not miss-spell the word used for a Tab, that includes Caps on the first letter!
Now that you got the Barebones of your tab Put in a message and add a second Table and both Tabl should be displayed. This can also be used for your Profile!

You wanna put in a picture but it is not working? The biggest issue comes out of it when you use the wrong format.
To get the correct format, check whatever file your picture has, and add it at the end of the link. Then you will copy said link and use the img code. If the Picture is rather big maybe also use a Spoiler. That is pretty much it already.

Wanna look for a Thread/Post? It is easier then you think!
First go to the Search page which is located here

and a New page shows up.

I will go through the menu step-by step, to avoid confusion.

"Search What?" That will set for what you are looking for, if its a message or topic you can put in a word that you think is in the title of the Topic or was atleast said once, If you search for a Player it should be obvious that you should put in the Player name then and if you look for a Tribe you should be putting in the name of the Tribe.

"Search" This is where the Input goes, for playername,tribename, or keyword for Topic/post.

"In What?" This is where you can specify the search for the word, lets say you are searching for "Tribe":
putting in "in posts" will only show Posts which have the word "Tribe in them
putting in "in topic titles" will only show Topics that have the word "Tribe" in the title
putting in " in both" will show both search results.

"Author" I usually never use that, but basicly it means who started the thread.

"Forum" The search tool will look through that Forum you picked, so meaning if you are looking for a Topic inside the Transformice Forum, pick Transformice.

"Community" That means which community will be checked for the keyword.. If you are from France (For a example) and you want to look through the french community, switch the community to the that one.

This is not a complete guide yet, I will add more things to it as time passes by! Also if you happen to find miss-spelled words be sure to correct me, and where the words were miss-spelled. Mistakes sometimes happen and I try to avoid them.