This tool adds a perpendicular constraint to two entities that have a direction, such as lines and text entities.
To use the tool, identify two suitable entities. The entities will then be constrained so that they are perpendicular to each other.
Alternatively, you can select a pair of entities and then start the tool. The perpendicular constraint will then be added to the selected entities.
After creating the perpendicular constraint you can hover your cursor over the constraint and all related entities will be highlighted.
NOTE: Whilst this tool can be used to move entities so as to satisfy the constraint, it is recommended that entities are created in the desired position.