Before constructing objects it may be necessary to define a new coordinates system.

This can be done using the "Skew line".

Construct object

For a clearer demonstration  the measurement has been switched off here

("Table"-"Measure object").The displayed objects were created  with the

MT-functions,

point ,   line ,   circle     and circle segment

but it is also possible to construct new ones from already measured objects.

After a click on

the following window appears.Having clicked on the desired objects,

which are at once presented in inverted colours, the objects possible to

construct are offered  in the drop down list.

Choose the object which is to be constructed and click on "Construct". The

object will be designed and added to the objects list.

In our example the objects 3,5,6 become a circle and are entered into the

list as object 7.