# Concepts [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) Background explanations and reference concepts for drawing and CAD tasks. ## Topics - [About Actions of Dynamic Blocks](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Actions%20of%20Dynamic%20Blocks.md) - [About Adding Parameters to Dynamic Blocks](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Adding%20Parameters%20to%20Dynamic%20Blocks.md) - [About Adjusting the Grid and Snap Space](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Adjusting%20the%20Grid%20and%20Snap%20Space.md) - [About Breaking and Joining Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Breaking%20and%20Joining%20Objects.md) - [About Chamfers](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Chamfers.md) - [About Changing Raster Image Brightness, Contrast and Fade](About%20Changing%20Raster%20Image%20Brightness%2C%20Contrast%20and%20Fade.md) - [About Clipping Raster Images](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Clipping%20Raster%20Images.md) - [About Controlling Plot Settings](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Controlling%20Plot%20Settings.md) - [About Copying Properties Between Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Copying%20Properties%20Between%20Objects.md) - [About Creating and Using Tools from Objects and Images](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Creating%20and%20Using%20Tools%20from%20Objects%20and%20Images.md) - [About Defining and Attaching Block Attributes](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Defining%20and%20Attaching%20Block%20Attributes.md) - [About Defining Hatch Boundaries](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Defining%20Hatch%20Boundaries.md) - [About Defining User Coordinate Systems](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Defining%20User%20Coordinate%20Systems.md) - [About Dimension Styles](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Dimension%20Styles.md) - [About Displaying and Changing the Properties of Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Displaying%20and%20Changing%20the%20Properties%20of%20Objects.md) - [About Editing OLE Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Editing%20OLE%20Objects.md) - [About Editing Referenced Drawings](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Editing%20Referenced%20Drawings.md) - [About Entering 2D Coordinates](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Entering%202D%20Coordinates.md) - [About Entering 3D Coordinates](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Entering%203D%20Coordinates.md) - [About Entering Commands on the Command Line](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Entering%20Commands%20on%20the%20Command%20Line.md) - [About Exploding Compound Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Exploding%20Compound%20Objects.md) - [About Geometric Tolerances](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Geometric%20Tolerances.md) - [About Importing OLE Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Importing%20OLE%20Objects.md) - [About Importing PDF Files](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Importing%20PDF%20Files.md) - [About Improving Speed by Displaying Simplified Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Improving%20Speed%20by%20Displaying%20Simplified%20Objects.md) - [About Lineweights](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Lineweights.md) - [About Linking OLE Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Linking%20OLE%20Objects.md) - [About Mirroring Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Mirroring%20Objects.md) - [About Modifying Block Definitions](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Modifying%20Block%20Definitions.md) - [About Modifying Dimension Text](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Modifying%20Dimension%20Text.md) - [About Modifying Text](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Modifying%20Text.md) - [About Moving Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Moving%20Objects.md) - [About Navigating and Editing Within the Command Window](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Navigating%20and%20Editing%20Within%20the%20Command%20Window.md) - [About Offsetting Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Offsetting%20Objects.md) - [About Panning and Zooming](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Panning%20and%20Zooming.md) - [About Plotting](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Plotting.md) - [About Publishing Drawings](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Publishing%20Drawings.md) - [About Recovering from a System Failure](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Recovering%20from%20a%20System%20Failure.md) - [About Repairing a Damaged Drawing File](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Repairing%20a%20Damaged%20Drawing%20File.md) - [About Rotating Objects](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Rotating%20Objects.md) - [About Selecting Objects Based on Shared Properties](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Selecting%20Objects%20Based%20on%20Shared%20Properties.md) - [About Sheet Sets](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Sheet%20Sets.md) - [About the Types of Dimensions](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20the%20Types%20of%20Dimensions.md) - [About Toolbars](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Toolbars.md) - [About Using Object Snaps](Help%20System/GSTARCAD/2027/Commands/02%20Concepts/About%20Using%20Object%20Snaps.md)