Before you start your first working session, you can customize the way
you work to suit your habits.
This type of customization is stored in permanent setting files: these
settings will not be lost if you end your session.
Select Tools > Options...
The Options dialog box opens.
Select the Mechanical Design category in the
left-hand box.
Select the Sketcher sub-category.
The
Sketcher tab that appears lets you set different options.