added section about unnumbered subsections, escaping characters and landscape page

README.md

@@ -48,6 +48,9 @@ automatically styled correctly.
 | `\subsubsection{<YOUR_TITLE>}`    | This is the second subtitle. It is numbered with three numbers (e.g. 1.1.1 Subsubtitle).                   |
 | `\subsubsubsection{<YOUR_TITLE>}` | This is the third subtitle. It is not numbered at all and is also not showing up in the table of contents. |
 
+If the section should not be numbered, you can use a * before the opening bracket. Should look like this:
+`\subsection*{<YOUR_TITLE>}`.
+
 ## Formatting text
 
 The following commands are used to format normal paragraphs. However, most commands can be used in other environments (
@@ -60,6 +63,16 @@ e.g. tables) as well.
 | `\textit{<TEXT>}`    | Formats the text inside the brackets italic.                                                                                     |
 | `\underline{<TEXT>}` | Underlines the text inside the brackets.                                                                                         |
 
+## Escaping characters
+
+Some characters are used as a part of a command for latex. Due to that, they need to be escaped when they should be
+printed specifically. To escape a character, you use a '\\' before the character or symbol. Typical symbols you need to
+escape are:
+
+| Symbol | Escaped |
+|--------|---------|
+| \\     | \\\     |
+
 ## Bulletpoints and Enumerations
 
 ### Bulletpoints
@@ -447,4 +460,19 @@ So to import multiple pages of the same document, use the following syntax:
 ```
 
 The first command imports the first page of your pdf. The second command includes the 2nd to last page into your main
-file. You can also change the page-range of the second command, in case you don't want all pages to the last inculded.
+file. You can also change the page-range of the second command, in case you don't want all pages to the last inculded.
+
+# Create a landscape page inside a document
+
+To create a landscape page inside a portrait document, you can use `\begin{landscape}`. In the following example this is
+explained better:
+
+```latex
+This paragraph is still in portrait.
+\pagebreak
+\begin{landscape}
+  This paragraph is in landscape.
+\end{landscape}
+
+This paragraph is in portrait again.
+```