presentation: added pdfpc and reformatted

wiki/presentation.md

@@ -8,10 +8,19 @@ Presentation tools are often used to support the presentation.
 The following is a list of these tools.
 
 - PowerPoint is a tool often used for creation and presenting in [Windows](/wiki/windows.md).
-  It can be used on dual screen setup to give the presenter an additional slide for comments.
+    It can be used on dual screen setup to give the presenter an additional slide for comments.
 - PDF files can easily be used for presenting cross-platform but often used for
-  [Linux-based operating systems](/wiki/linux.md). 
-  They can easily be generated by [LaTeX](/wiki/markup_language.md#latex).
-- [pympress](https://github.com/Cimbali/pympress) is a cross-platform tool for the presentation via
-  PDF files.
-  It is also usable for dual screen setups.
+    [Linux-based operating systems](/wiki/linux.md).
+    They can easily be generated by [LaTeX](/wiki/markup_language.md#latex).
+- [pympress](https://github.com/Cimbali/pympress) is a cross-platform tool for giving presentations
+    using PDF files.
+    It is usable for dual screen setups and features basic notes and timer functions.
+- [pdfpc](https://pdfpc.github.io/) is a cross-platform tool for giving presentations using PDF
+    files.
+    It is usable for dual screen setups and features basic notes and timer functions.
+    In contrast to pympress it features more elaborate functions and abilities to include timer
+    and other options inside the PDF using the `pdfpc` LaTeX package.
+    However, it also works well with LaTeX's default `\note` function.
+    Basic guides for this can be found on the pages of
+    [toromtomtom](https://www.toromtomtom.com/blog/2021/10/17/pdfpc.html) and
+    [Utah university](https://ctan.math.utah.edu/ctan/tex-archive/macros/latex/contrib/pdfpc/pdfpc-doc.pdf).