# Dimensions [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [User Guide](Help%20System/GSTARCAD/2021/User%20Guide/(User%20Guide).md) [The Overview of Dimension](Help%20System/GSTARCAD/2021/User%20Guide/Dimensions/Overview%20of%20Dimension.md) Using several dimensioning commands, you can add measurements to your drawing. To format dimensions quickly and maintain industry or project dimensioning standards, you can use dimension styles. [Use Dimension Styles](Help%20System/GSTARCAD/2021/User%20Guide/Dimensions/Use%20Dimension%20Styles.md) By changing the settings, you can control the appearance of dimensions. These settings can be stored in dimension styles to maintain dimensioning standards for your own convenience. [Create Dimensions](Help%20System/GSTARCAD/2021/User%20Guide/Dimensions/Create%20Dimensions.md) All of the standard types of dimensions can be created. [Modify Existing Dimensions](Help%20System/GSTARCAD/2021/User%20Guide/Dimensions/Modify%20Existing%20Dimensions.md) All components of the existing dimension objects in a drawing can be modified either individually or by using dimension styles. [Add Geometric Tolerances](Help%20System/GSTARCAD/2021/User%20Guide/Dimensions/Add%20Geometric%20Tolerances.md) Geometric tolerances showing acceptable deviations of form, profile, orientation, location and runout of a feature can be added. --- ## Other versions with matching text [GstarCAD 8 (2013–2014)](../../2013/User%20Guide/Dimensions.md) · [GstarCAD 2015](../../2015/User%20Guide/Dimensions.md) · [GstarCAD 2016](../../2016/User%20Guide/Dimensions.md) · [GstarCAD 2017](../../2017/User%20Guide/Dimensions.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/User%20Guide/Dimensions.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/User%20Guide/Dimensions.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/User%20Guide/Dimensions.md)