Show-HelpForCurrentSelection.ps1

function Show-HelpForCurrentSelection {
    <#
    .Synopsis
        Shows help for the currently selected text
    .Description
        Shows helps for the currently selected text
    .Example
        Show-HelpForCurrentSelection
    #>

    param()
    Select-CurrentText | 
        ForEach-Object {
            if (-not $_) { return }
            $trim = $_.Trim()
            Get-Help $_ -ErrorAction SilentlyContinue -Full
        }
}