Correct. Edit: Also, an unattached sketch defaults to its native XY-Plane.
edwilliams16 wrote: ↑Mon Jun 20, 2022 6:02 pm They show the result of the effects of the Attachment (which rotates the sketch from its XY plane into the XZ Plane, and the effect of the Attachment offset - which being perpendicular to the sketch is -30 mm along the global negative z-axis.)
Almost. The XZ_Plane is the global front view. In sketch coordinates x goes to the right, y is up the screen and z is towards you. Towards you is the global negative y -axis. So to move your sketch along the positive y-axis, you had to move it along the sketch negative z-axis. That's why your attachment offset was (0, 0, -30) not (0, 0, 30).RussG wrote: I've read and re-read this part of your comments at least a dozen times. Would this be another way of saying what you did?: When the Attachment of my sketch which was drawn on the XY plane is translated by FreeCAD into the Global 3D space of the 3D View Window, the Z axis of my sketch translates to (aligns with) the Y axis of the Global space so that when I change the Z value of the sketch in the Position dialog it moves along the Y axis in the Global Space. Am I understanding this correctly?
This is a quirk of the XZ-plane. For the XY and YZ planes, displacements along global z and global x are positive displacements along attachment-z.