Catia+v5+sketch+tools

You can also manually switch between line, tangent arc, and three-point arc modes using the dynamic user input toolbar that appears at the top of the graphics area. Predefined Profiles

Never let a sketch float in space. Always constrain your primary geometry back to the axes or the central origin point 5. Conclusion catia+v5+sketch+tools

The is a unique, dynamic toolbar. Unlike others that contain static commands, this one changes based on the tool you currently have active. You can also manually switch between line, tangent