# PDFADJUST Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) **Function Description:** This command is used to adjust the Fade, Contrast and Monochrome settings of a PDF underlay.Users can change the default values for Fade, Contrast and Monochrome for a single or multiple PDF underlays. To confirm the settings on a selected PDF underlay, use the Properties palette. **Command Access:** > **Icon:** / > **Menu:** / > **Ribbon:** / > **Toolbar:** / > **Command:** PDFADJUST > **Alias:** / **Command Prompts:** ``` Select PDF underlay: ``` --- **Related References：** - [Commands about Underlays (GstarCAD 2026)](../../2026/Commands/Command%20Groups/Commands%20about%20Underlays.md) **Related Tasks：** - [To Adjust the Appearance of a PDF Underlay (GstarCAD 2026)](../../2026/Commands/To%20Adjust%20the%20Appearance%20of%20a%20PDF%20Underlay.md) - [To Adjust the Appearance of a DGN Underlay (GstarCAD 2026)](../../2026/Commands/To%20Adjust%20the%20Appearance%20of%20a%20DGN%20Underlay.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences/PDFADJUST.html) · © Gstarsoft Co., Ltd.