# PDFLAYERS Command
[GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [Commands](Help%20System/GSTARCAD/2022/Commands/(Commands).md) → [P](Help%20System/GSTARCAD/2022/Commands/P/(P).md)
## Function Description:
This command is used to control the display of layers in a PDF underlay. After
you select a PDF underlay according to the command prompt, the Underlay Layers
dialog box is displayed.
You can turn layers on and off in an underlay. By default, all visible layers in
the underlay are turned on when you attach the file.
## Command Access:
> **Icon:**
> 
> **Menu:** /
> **Ribbon:** /
> **Toolbar: /**
> **Command:** PDFLAYERS
> **Alias:** /
## Command Prompts:
/
If the Underlay Layers dialog box is empty, there are no layers in
the underlay.
You can use the Properties palette to determine whether any layers are
turned off in an underlay.
- If no layers are turned off, the Layer Display Override property is set to None.
- If at least one layer is turned off, the Layer Display Override property is set to Applied.