Microsoft.PowerShell_profile.ps1

set-location -Path C:\

$Shell = $Host.UI.RawUI
$size = $Shell.WindowSize
$size.width=150
$size.height=50
$Shell.WindowSize = $size

$size.Width=150
$size.Height=3000
$Shell.BufferSize = $size

$shell.BackgroundColor = "DarkBlue"
$shell.ForegroundColor = "Yellow"

Clear-Host

function Add-Path {
  <#
    .SYNOPSIS
      Adds a Directory to the Current Path
    .DESCRIPTION
      Add a directory to the current path.  This is useful for 
      temporary changes to the path or, when run from your 
      profile, for adjusting the path within your powershell 
      prompt.
    .EXAMPLE
      Add-Path -Directory "C:\Program Files\Notepad++"
    .PARAMETER Directory
      The name of the directory to add to the current path.
  #>

  [CmdletBinding()]
  param (
    [Parameter(
      Mandatory=$True,
      ValueFromPipeline=$True,
      ValueFromPipelineByPropertyName=$True,
      HelpMessage='What directory would you like to add?')]
    [Alias('dir')]
    [string[]]$Directory
  )

  PROCESS {
    $Path = $env:PATH.Split(';')

    foreach ($dir in $Directory) {
      if ($Path -contains $dir) {
        Write-Verbose "$dir is already present in PATH"
      } else {
        if (-not (Test-Path $dir)) {
          Write-Verbose "$dir does not exist in the filesystem"
        } else {
          $Path += $dir
        }
      }
    }

    $env:PATH = [String]::Join(';', $Path)
  }
}

Add-Path -Directory “C:\Program Files (x86)\git\bin”

Set-Alias np c:\windows\notepad.exe
Set-Alias octave C:\Software\Octave-3.6.4\bin\octave-3.6.4.exe