simulation.md

 # Run a simulation
+```
+./VKRun run.mac
+```
 
-Run a simulation:  `./VKRun run.mac`
-
-## run.mac
-
-The file `run.mac` contains commands which can be used to modify the simulation. The commands currently available are:
+# Modify the run macro
+The run macro file (`run.mac`) allows you to modify certain aspects of the simulation. Click (here)[] to see all available commands.
 
 ### Verbosity
 * /run/verbose  0