# Property Query Table Dialog Box [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [B](Help%20System/GSTARCAD/2027/Commands/B/(B).md) **Function Description:** This command is used to create and modify a lookup table for custom properties within the dynamic block definition.  **Dialog Box Options:** ## Action Name Displays the associated lookup action name, which you can edit in the Properties palette. ## Add Properties Displays the Add Parameter Feature dialog box.  ## Audit Checks the data to ensure that each row is unique. ## Input Properties Displays the parameters you select in the Add Parameter Feature dialog box as columns. When a parameter value matches the input property column, the corresponding lookup property is assigned to the block reference. ## Select Properties Displays the custom value assigned to the input properties. Click the bottom of a lookup column to make the lookup property read-only or to allow reverse lookup. Allow Reverse Lookup enables a drop-down list associated with the lookup grip that changes the block reference to match the input property values in the table. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_B/BLOOKUPTABLE_DIA.html) · © Gstarsoft Co., Ltd.