diff --git a/PSFzf.TabExpansion.ps1 b/PSFzf.TabExpansion.ps1
index 2a46d6f..371cc1b 100644
--- a/PSFzf.TabExpansion.ps1
+++ b/PSFzf.TabExpansion.ps1
@@ -284,12 +284,33 @@ function script:Invoke-FzfTabCompletionInner() {
             $additionalCmd = @{ Preview = $($script:PowershellCmd + " -NoProfile -NonInteractive -File \""$previewScript\"" \""" + $path + "\"" {}") }
         }
 
+        $previewWindow = 'down:30%'
+        $altPreviewWindow = 'right:50%'
+
+        if (([string]::IsNullOrWhiteSpace($env:_PSFZF_FZF_TAB_PREVIEW_DEFAULT)) -or ($env:_PSFZF_FZF_TAB_PREVIEW_DEFAULT -eq 'down') ) {
+            $previewWindow = 'down:30%'
+            $altPreviewWindow = 'right:50%'
+        }
+        elseif ($env:_PSFZF_FZF_TAB_PREVIEW_DEFAULT -eq 'right') {
+            $previewWindow = 'right:50%'
+            $altPreviewWindow = 'down:30%'
+        }
+        elseif ($env:_PSFZF_FZF_TAB_PREVIEW_DEFAULT -eq 'left') {
+            $previewWindow = 'left:50%'
+            $altPreviewWindow = 'down:30%'
+        }
+        elseif ($env:_PSFZF_FZF_TAB_PREVIEW_DEFAULT -eq 'top') {
+            $previewWindow = 'top:50%'
+            $altPreviewWindow = 'left:50%'
+        }
+        $changePreviewWindow = "$previewWindow,$altPreviewWindow,border-rounded|hidden|"
+
         $script:fzfOutput = @()
         $completionMatches | ForEach-Object { $_.CompletionText } | Invoke-Fzf `
             -Layout reverse `
             -Expect "$expectTriggers" `
-            -PreviewWindow 'down:30%' `
-            -Bind 'tab:down', 'btab:up', 'ctrl-/:change-preview-window(down,right:50%,border-top|hidden|)' `
+            -PreviewWindow "$previewWindow" `
+            -Bind 'tab:down', 'btab:up', "ctrl-/:change-preview-window($changePreviewWindow)" `
             @additionalCmd | ForEach-Object {
             $script:fzfOutput += $_
         }
diff --git a/README.md b/README.md
index 7594bea..bfb16c5 100644
--- a/README.md
+++ b/README.md
@@ -100,13 +100,14 @@ Get-ChildItem . -Recurse | ? { $_.PSIsContainer } | Invoke-Fzf | Set-Location
 ## Overriding Behavior
 
 PsFzf supports overriding behavior by setting these fzf environment variables:
-| Env Var Name                 | Description                                                                                                                  |
-|------------------------------|------------------------------------------------------------------------------------------------------------------------------|
-| `_PSFZF_FZF_DEFAULT_OPTS`    | If this environment variable is set, then `FZF_DEFAULT_OPTS` is temporarily set with the contents. This allows the user to have different default options for PSFZF and fzf.
-| `FZF_DEFAULT_COMMAND`        | The command specified in this environment variable will override the default command when PSFZF detects that the current location is a file system provider. |
-| `FZF_CTRL_T_COMMAND`         | The command specified in this environment variable will be used when <kbd>Ctrl+t</kbd> is pressed by the user.                |
-| `FZF_ALT_C_COMMAND`          | The command specified in this environment variable will be used when <kbd>Alt+c</kbd> is pressed by the user.                 |
-| `PSFZF_EDITOR_OPTIONS`       | Contains options passed to the editor application used in the `Invoke-FuzzyEdit()` function                                   |
+| Env Var Name                     | Description                                                                                                                   |
+|----------------------------------|-------------------------------------------------------------------------------------------------------------------------------|
+| `_PSFZF_FZF_DEFAULT_OPTS`        | If this environment variable is set, then `FZF_DEFAULT_OPTS` is temporarily set with the contents. This allows the user to have different default options for PSFZF and fzf. |
+| `FZF_DEFAULT_COMMAND`            | The command specified in this environment variable will override the default command when PSFZF detects that the current location is a file system provider. |
+| `FZF_CTRL_T_COMMAND`             | The command specified in this environment variable will be used when <kbd>Ctrl+t</kbd> is pressed by the user.                 |
+| `FZF_ALT_C_COMMAND`              | The command specified in this environment variable will be used when <kbd>Alt+c</kbd> is pressed by the user.                  |
+| `PSFZF_EDITOR_OPTIONS`           | Contains options passed to the editor application used in the `Invoke-FuzzyEdit()` function                                    |
+| `_PSFZF_FZF_TAB_PREVIEW_DEFAULT` | This environment variable controls the default location for the preview preview window during tab completion (default: `down`) |
 
 ## Helper Functions