> For the complete documentation index, see [llms.txt](https://docs.roboflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.roboflow.com/annotate/use-roboflow-annotate/keyboard-shortcuts.md).
# Keyboard Shortcuts
The following keyboard shortcuts are available to speed up your labeling flow. The **meta** key is usually the **command** key on macOS and the **ctrl** key on Linux and Windows.
## Shortcuts without a Selected Annotation
If no annotation is selected, the following keyboard shortcuts apply:
* **meta** - temporarily switches between the **Drag/Select** and **Bounding Box (B)** or **Polygon (P)** tools while held down. (For example, if you are in **Bounding Box** mode, hold down the meta key and click an existing bounding box to select it.)
* **b** - Switches to the **Bounding Box** tool.
* **p** - Switches to the **Polygon** tool.
* **d** - Switches to the **Drag/Select** tool. 
* **n** - Switches to the **Mark Null** tool.
* entering **n** while annotating an image that is already marked as *Null* will mark that image as *Unannotated* if it is currently in the *Annotating* queue.
* **s** - switches to the **Smart Polygon** tool.
* **plus** - Zooms In.
* **minus** - Zooms Out.
* **zero** - Returns to Default Zoom (fits image into the viewport).
* **one** - Zooms to 100%.
* **escape** (esc) - Exits the Labeling Tool.
* **left arrow** - Navigates to the previous image.
* In Classification projects, **left arrow** + **cmd**.
* **right arrow** - Navigates to the next image.
* In Classification projects, **right arrow** + **cmd**.
* **shift** + **a** - Adds the current image to the dataset during an annotation job. If annotation review is enabled, opens the "Submit for Review" dialog instead.
## Shortcuts with a Selected Annotation
Once an annotation is selected and the class selector is visible, the shortcuts are as follows:
* **enter** - Saves the Active Option (highlighted in purple) as the current class, or label, for the selected bounding box.
* **escape** (esc) - Cancels and deselects the current box without changing its label (if the currently selected box was just drawn it will be deleted).
* **up arrow** - Changes the Active Option (class/label) to the previous one.
* **down arrow** - Changes the Active Option (class/label) to the next one.
* **backspace** - Deletes the current bounding box if there is no text in the text field (this means you will usually have to *push backspace twice to delete a box after selecting it*; one time to delete the highlighted text and a second time to confirm deletion).
## Shortcuts in Review Mode
Review mode is the interface that lets a reviewer approve or reject an annotation.
If you are in review mode, the following shortcuts are available:
* **a** (in Review Mode) Approve annotation or label
* **r** (in Review Mode) Rejects annotation or label
---
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