Locate the Color & Style options.
Select from the main menu bar in the Visualization module, and click the Color & Style tab in the dialog box that appears.
Click the Force tab or the Moment tab to change vector scaling settings for force vectors or moment vectors, respectively. The Scaling options are in the lower third of the page.
From the Basis options, select Screen size or Model size.
Drag the Percent slider to establish the vector length as a percentage of the size of the screen or model.
Click OK to implement your changes and to close the Free Body Plot Options dialog box.
By default, your changes are saved for the duration of the session and will affect all subsequent free body cuts plots in that viewport. If you want to retain your changes for subsequent sessions, save them to a file. For more information, see Saving customizations for use in subsequent sessions.