I am reading Windows Powershell™ 2 For Dummies® and chapter 2 explains how to customize the powershell console.

Created a file Microsoft.PowerShellISE_profile.ps1 with the following contents:

$Shell = $Host.UI.RawUI
$Shell.WindowTitle="PowerShell Obeys Me"
$Shell.BackgroundColor="White"
$Shell.ForegroundColor="Blue"
$size = $Shell.WindowSize
$size.width=120 $size.height=55
$Shell.WindowSize = $size
$size = $Shell.BufferSize
$size.width=120
$size.height=5000
$Shell.BufferSize = $size
Clear-Host

When I load the powershell_ise, it does change the window title, background, foreground colors, but I also receive the following errors:

Property 'width' cannot be found on this object; make sure it exists and is settable.
At C:\Users\[user]\Documents\WindowsPowerShell\Microsoft.PowerShellISE_profile.ps1:6 char:7 + $size. <<<< width=120 + CategoryInfo : InvalidOperation: (width:String) [], RuntimeException + FullyQualifiedErrorId : PropertyNotFound

Property 'height' cannot be found on this object; make sure it exists and is settable. At C:\Users\[user]\Documents\WindowsPowerShell\Microsoft.PowerShellISE_profile.ps1:7 char:7 + $size. <<<< height=55 + CategoryInfo : InvalidOperation: (height:String) [], RuntimeException + FullyQualifiedErrorId : PropertyNotFound

Exception setting "WindowSize": "Cannot convert null to type "System.Management.Automation.Host.Size"." At C:\Users\[user]\Documents\WindowsPowerShell\Microsoft.PowerShellISE_profile.ps1:8 char:8 + $Shell. <<<< WindowSize = $size + CategoryInfo : InvalidOperation: (:) [], RuntimeException + FullyQualifiedErrorId : PropertyAssignmentException

How do I fix these errors?

$host.UI.RawUI.WindowSize isn't set in ISE, its only set with a PowerShell console instance.

Thank you.

Yeah, you were trying to edit the Microsoft.PowerShellISE_profile.ps1 instead of the Microsoft.PowerShell_profile.ps1.  Tripped me up too.  The ISE and the command shell both have their own profile in the same location that can be modified.