fixed the heading sizes

documentation/index.md

@@ -1,19 +1,19 @@
-# Documentation
+## Documentation
 There are 4 categories of documentation, the first is for users of the GUI and provides educational resources regarding the underlying solution methods, the second is for users of the Monte Carlo Command Line (MCCL) application, the third is for Windows MATLAB users to access the VTS libraries using the VTS MATLAB Package, and the fourth is for developers wishing to access and/or modify the source code.
 
-## VTS GUI Documentation
+### VTS GUI Documentation
 * [Description of the panels in the GUI Application](https://github.com/VirtualPhotonics/Vts.Gui.Wpf/wiki/Software)
 * [Video Walkthroughs of the GUI Application](https://virtualphotonics.org/video)
 
-## Documentation for Monte Carlo Command Line (MCCL) Application
+### Documentation for Monte Carlo Command Line (MCCL) Application
 * [Editing Monte Carlo Command Line infiles](https://github.com/VirtualPhotonics/Vts.MonteCarlo/wiki/MCCL-Editing-infiles)
 * [Running MCCL](https://github.com/VirtualPhotonics/Vts.MonteCarlo/wiki/MCCL-Examples)
 * [Capabilities and Implementation of Conventional Monte Carlo](https://github.com/VirtualPhotonics/Vts.MonteCarlo/wiki/MCCL-Capabilities-And-Implementation)
 
-## Documentation for VTS MATLAB Package
+### Documentation for VTS MATLAB Package
 * [Getting Started with MATLAB](https://github.com/VirtualPhotonics/VTS/wiki/VTS-MATLAB)
 
-## Instructions for VTS Source Code Download and Use
+### Instructions for VTS Source Code Download and Use
 * Getting Started ([Linux](https://github.com/VirtualPhotonics/VTS/wiki/Getting-Started-on-Linux), [Mac](https://github.com/VirtualPhotonics/VTS/wiki/Getting-Started-on-Mac), [Windows](https://github.com/VirtualPhotonics/VTS/wiki/Getting-Started-in-Windows))()
 * [Coding Conventions](https://github.com/VirtualPhotonics/VTS/wiki/Coding-Conventions)
 * [Compiling and running the VTS](https://github.com/VirtualPhotonics/VTS/wiki/Compile-and-run-the-VTS)