Add fields for each install setting to the Installation.md page

Make that clear for everyone

docs/quick_start/Installation.md

@@ -21,9 +21,29 @@ To build the optional python bindings the following are also needed:
 
 - Python 3.6 or greater
 
+### Installation Settings
+
+#### `BUILD_PARAMS`
+
+If `BUILD_PARAMS` is ON then build the operators with non-linearly optimized scale and shift parameters, and the relevant optimization files
+
+#### `BUILD_PYTHON`
+
+If `BUILD_PYTHON` is ON then build the python bindings
+
+#### `BUILD_TESTS`
+
+If `BULD_TESTS` is ON then build GTest based tests
+
+#### `EXTERNAL_BOOST`
+
+If `EXTERNAL_BOOST` is ON then use the pre-built Boost Libraries currently in your path or in `$ENV{BOOST_ROOT}`
+
 ### Installing `SISSO++`
+
 `SISSO++` is installed using a cmake build system, with sample configuration files located in `cmake/toolchains/`
 For example, here is `initial_config.cmake` file used to construct `SISSO++` and the python bindings using the gnu compiler.
+
 ```
 ###############
 # Basic Flags #
@@ -38,14 +58,17 @@ set(CMAKE_CXX_FLAGS "-O3 -march=native" CACHE STRING "")
 set(BUILD_PYTHON ON CACHE BOOL "")
 set(BUILD_PARAMS ON CACHE BOOL "")
 ```
+
 Here the `-O3` flag is for optimizations, it is recommended to stay as `-O3` or `-O2`, but it can be changed to match compiler requirements.
 
 When building Boost from source (`EXTERNAL_BOOST OFF`) the number of processes used when building Boost may be set using the
 `BOOST_BUILD_N_PROCS` flag in CMake.  For example, to build Boost using 4 processes, the following flag should be included in the
 `initial_config.cmake` file:
+
 ```
 #set(BOOST_BUILD_N_PROCS 4 CACHE STRING "")
 ```
+
 This flag will have no effect when linking against external boost, i.e. `EXTERNAL_BOOST ON`.
 
 To install `SISSO++` using `initial_config.cmake` run the following commands (this assumes gnu compiler and MKL are used, if you are using a different compiler/BLAS library change the flags to the relevant directories)