# Dimension Improvement [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [What's new](Help%20System/GSTARCAD/2022/What's%20new/(What's%20new).md) In GstarCAD 2022, the DIMREASSOCIATE, DIMREGEN, DIMCENTER, Stretch Dimension Group commands and the DIMLAYER and DIMTOFFSET system variables are supported to make dimension display more reasonable and accurate, and make it easier and faster to modify dimensions. **DIMREASSOCIATE** The DIMREASSOCIATE command allows associating or reassociating selected dimensions to objects or points on objects. When the defining point of selected dimension doesn’t associate with the geometry, the X mark is displayed. When the defining point of the selected dimension associates with the geometry, the ⊠ mark is displayed.  **DIMREGEN** The DIMREGEN command allows updating the positions of all associative dimensions in Model space or Layouts. You can use this command to move associative dimensions to correct positions, as well as regenerate dimensions display according to current system variables value.  **DIMCENTER** A new option Polygon(P) has been added to the DIMCENTER command, which allows you to mark the center of polygons easily. **Stretch Dimension Group** The Stretch Dimension Group option in the dynamic grip menu allows adjusting all dimensions which share grips with each other at once. As long as the dimension you select shares grips with any other dimensions, you can hover the cursor on any of their grips and stretch together.  After select Stretch Dimension Group option, you will get 4 options: Specify stretch point or \[Base point/Copy/Undo/eXit\]: - **Base point:** you are able to move the dimensions according to the base point and second point you choose. - **Copy:** you are able to copy a new group of dimensions and move them together, the original dimension group won’t be deleted. - **Undo:** you are able to cancel the previous step. - **eXit:** you are able to stop the command. **DIMLAYER System Variable** The system variable DIMLAYER specifies a default layer for dimensions, and new dimensions are created on that layer automatically instead of creating dimensions on the current layer. **DIMTOFFSET System Variable** In GstarCAD 2022, if the space above the arrows is not enough for the dimension text when you place the dimension below or right the objects, the text will be placed downward. In this case, you can use two values of the system variable DIMTOFFSET to set two kinds of gap styles between the arrows and text, one is the same as AutoCAD, another reduces the gap. If you open a drawing in AutoCAD, in which the dimensions were created with DIMTOFFSET value being 0, once you move, copy or edit these dimensions, it will change back to the display of DIMTOFFSET value being 1\.