All options implemented; Basic usage added onto slides

README.md

@@ -44,10 +44,11 @@ E.g., `\only<2|handout:0>{This is not shown in handout mode.}`, `\item<1-|handou
 
 - The `spaceforface` option leaves extra space on the right-hand-side of the frame to put presenter's video. The width of the space can be adjusted by changing the <width> in \setlength{\spaceforface}{<width>} in `CELbeamer.cls`.
 
-Example: `\documentclass[de, navbaron, kitgrid, handout]{CELbeamer}`
+- The `overviewatsection` option displays the table of contents at each section. Only subsections of the current section is shown.
+
+Example: `\documentclass[de, navbaron, kitgrid, handout, overviewatsection]{CELbeamer}`
 
 ## Title Slide
------------
 Setup: `\begin{frame}[title white vertical, picture=images/...., fundings=]`
 
 The image on the title slide can be set with the `picture=` option. For vertical layouts, the image fits the height; for horizontal layouts, it fits the width.
@@ -62,8 +63,7 @@ Additionally, for horizontal layouts, you can choose the color of the KIT logo.
 
 Example: `\begin{frame}[title white horizontal, picture=images/palladio_bauplan, kitlogo=black]`
 
-Special Slides
---------------
+## Special Slides
 For tables of contents, you can specify the option `tableofcontents=<color>`, where `color` can be either `blue` or `green`. The table of contents will then be shown on a fully colored slide.
 
 There are also special layouts for divider slides with large images. You can select them using frame options.