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.
x1, y1 is the co-ordinates of the beginning of the line.
x2, y2 those of the end of the line.
dx and Dy, its projections according to X and Y.
L its length, A its angle.

There a polygon and the first information is identical to the line and relates to the selected segment of the polygon.
Then you have the length of the polygon, its perimeter and its surface. If the polygon is closed, its length is equal to its perimeter.
The additional arrows make it possible to post the data of each segment of the polygon.

Here an arc is selected.
xc and yc defines the center of the arc, R its radius, D its diameter, SA its angle starting and AA is the angle of the arc.
Then you have his length, his perimeter and its surface.

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.

The 3 last lines indicate the number of selected objects to us, the scale of the object which can be modified and which can be different from the scale by defect of the layer (but that is not practical, better is worth to create another layer), and the name of the layer, “Layer0” and “Layer1” here, on which is the selected object.
You will note that in 3 cases, the name of the layer is grayed (inactive button) because the selected object is on the active layer.
On the other hand, for the polygon, the button “Layer1” is active because the object is not on the active layer.
If you click on this button, the layer “Layer1” will become the active layer.
That gives you a simple and fast means to sail between the various layers of a drawing.

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.
(I begin in the handling from the mouse; -))

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.

It is thus seen that RealCADD admits the arithmetic formulas (+ - */()) in the editfields.
If the formula starts with + - * or /, RealCADD will combine the formula with the initial value.
If you wish to enter a negative value or a formula without RealCADD combining it with the initial value, it is enough to start with =

The pallet of management of layers or pages…