Translations:Engine Block Tutorial/35/en

Entering 2D Drafting Mode
First we need to switch to the 2D Drafting workbench, to do this from part mode you can select 2D Drafting from the dropdown box at the top that currently says Part. If you cannot find the dropdown box (not all workbenches show the dropdown) you can also select a workbench from the View->Workbench menu entry. Even though we are doing 2d drawing, we will draw them in the 3D window by telling FreeCAD what plane we want the drawings projected into. After you have selected the 2D Drafting workbench just above the top-right corner of the 3D view and click on the leftmost button which will say one of the following {none, top, front, size, or d(..., ..., ...)}. Once you click that, the left side of the bar will have a text box for you to enter a plane offset, and 5 buttons: XY, XZ, YZ, View, and None. The first three are the standard top, front, and side views, the View entry will use the plane perpendicular to the direction the camera is looking (the camera's viewplane), and the last will not project into a plane and let you fully define the XYZ coordinates for every point you draw. We want to set a plane offset of 110 (type it in and press enter) and then click the XY button to project the drawing onto the XY plane, located 110 mm up the Z axis which corresponds to the top of the engine block. Now that we have told FreeCAD what plane to draw in we are ready to start designing the head gasket.