Draft SelectPlane

Description
The Draft Workbench features a working plane system. A plane in the 3D view indicates where a Draft shape will be built. There are several methods to define the working plane:
 * From a selected face.
 * From three selected vertices.
 * From the current view.
 * From a preset: top, front, or side.
 * None, in which case the working plane is adapted automatically to the current view when you start a command, or to a face if you start drawing on an existing face.



Usage
The button is present in the Draft Tray toolbar, which only appears in the Draft and Arch workbenches.

Without element selected

 * 1) Press the  button, or use  →  →  from the top menu, or the keyboard shortcut  then
 * 2) Select the offset, the grid spacing, and the main lines
 * 3) Select one of the presets:, , , , or.

Once the plane is set, the button will change to indicate the active plane, , , ,.

You can show and hide the grid with the shortcut.

With element selected

 * 1) Select a face of an existing object in the 3D view, or hold  and select three vertices of any object.
 * 2) Press the  button, or right click and select.

The plane will be created aligned to the face of the object, or to the plane defined by the three vertices.

Options

 * Pressing any of the buttons will finish the command and close the task panel.
 * Press the button to align the working plane with the XY plane of the global coordinate system.
 * Press the button to align the working plane with the XZ plane of the global coordinate system.
 * Press the button to align the working plane with the YZ plane of the global coordinate system.
 * Press the button to align the working plane perpendicular to the camera axis of the current 3D view. If the  checkbox is unchecked the working plane origin will match the origin of the global coordinate system, else it will match the center of to the current 3D view.
 * Press the button to automatically align the working plane with the current 3D view whenever a Draft command requiring point input is started. This is equivalent to pressing the  button before using the command.
 * Change the to place the working plane at a perpendicular distance from the selected plane.
 * Check the checkbox to put the origin of the working plane in the center of to the current 3D view. This option really only makes sense if the  button is used.
 * Select a vertex in the 3D view and press the button to move the working plane so that its origin matches the position of the selected vertex.


 * Set the "Grid spacing" value to define the space between each line in the grid.
 * Set the "Grid size" value to define the overall extension of the grid plane.
 * Set the "Main line every" value to draw a slightly thicker line in the grid at the set value. For example, if the grid spacing is 0.5 m, and there is a main line every 20 lines, there will be slightly thicker line every 10 m.


 * Press or the  button to abort the current command.
 * The grid displays an additional border with mainline spacing indicated in the bottom left corner . This can be disabled via.

Scripting
Draft API and FreeCAD Scripting Basics. See the WorkingPlane API.

Working plane objects can easily be created and manipulated in macros and from the Python console.

You can access the current Draft working plane, and apply transformations to it:

A Draft command must be issued after changing the working plane to update the visible grid, for example, Line, or just ToggleGrid.

You can create your own planes, and use them independently of the current working plane. This is useful if you need to make calculations or projections in these other planes.

To display a new grid use a new tracker object. First set up the normal working plane as you need, then create a new tracker object, then set it to the current plane, and then you can turn it on or off.

This grid is merely a visual aid and doesn't allow snapping.

To have the possibility of switching quickly to different grids, in different positions, you should create a.