The pallet of edition of the objects:
This pallet has a very important role.
If no object is selected or in the course of creation, the pallet is reduced to its bar of title.
Thanks
to it, one knows all the geometrical characteristics of the selected
object or of the last selected and one can modify them.
During the tracing of an object, all the data are updated instantaneously.
According to the type of selected object, its contents can change.
Indeed, information to be posted for an arc is not the same one as for a line.
Here a line is selected. 
There a polygon and the first information is identical to the line and relates to the selected segment of the polygon. 
Here an arc is selected. 
Here a rectangle is selected. For the objects at rectangular base, x1, y1 represent the left higher corner and x2, y2 the corner lower right. dx and Dy represent the lengths according to X and Y. Then you have his length, his perimeter (even value) and its surface. 



Interaction enters the drawing and the pallet of edition:
One wishes to trace a line with 65°, but with the mouse one obtains 64.9085°. One stops there… 
… then one clicks in the editfield of the angle, one types 65… 
… then one validates with return or enter, and the line is updated at 65°. 



Here, one wants to trace a rectangle of 2.55m by 1.75m but with the mouse one obtains 2.47 x 1.82. 
One thus enters the editfields, a formula in dx and a value for dy… 
… and after validation, our rectangle is such as one wanted it. 



The pallet of management of layers or pages…