# Dimensions [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [User Guide](Help%20System/GSTARCAD/2021/User%20Guide/(User%20Guide).md) [The Overview of Dimension](Overview%20of%20Dimension--45730a9a3133.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](Use%20Dimension%20Styles--d92b3dd5e09e.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](Create%20Dimensions--302869d8b028.md) All of the standard types of dimensions can be created. [Modify Existing Dimensions](Modify%20Existing%20Dimensions--43d737d1a515.md) All components of the existing dimension objects in a drawing can be modified either individually or by using dimension styles. [Add Geometric Tolerances](Add%20Geometric%20Tolerances--6faefa2ed682.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--654e78158a03.md) · [GstarCAD 2015](../../2015/User%20Guide/Dimensions--654e78158a03.md) · [GstarCAD 2016](../../2016/User%20Guide/Dimensions--654e78158a03.md) · [GstarCAD 2017](../../2017/User%20Guide/Dimensions--654e78158a03.md) · [GstarCAD 2018](../../2018/User%20Guide/Dimensions--654e78158a03.md) · [GstarCAD 2019](../../2019/User%20Guide/Dimensions--654e78158a03.md) · [GstarCAD 2020](../../2020/User%20Guide/Dimensions--654e78158a03.md)