One draws on the active reference plane. This can be a temporary reference plane, a custom reference plane or a World Cartesian reference plane. When a temporary reference plane is displayed by moving the cursor over an object’s face, one can lock the reference plane (shortcut F5) or create a custom reference plane by right clicking and selecting “ Save As Custom Reference Plane” from the context menu.
When the 3D or 3D Delta modes are active, the visible axis of any temporary or custom reference plane cannot be used to input values in the Input Palette X, Y, Z-edit boxes. (Except in those special cases where the temporary or custom reference plane is co-planar with the previously active World Cartesian reference plane.)
Doing so will not give the accurate X,Y,Z values as the 3D or 3D Delta coordinates reference the orientation and direction of the axis of the previously active XY-Plane, YZ-Plane, or ZX-Plane.
In the attached example, the custom reference axis is shown as solid color lines with arrow terminators. The dashed color lines show lines created when X, Y, Z values were input. These follow the World Cartesian reference plane axis.
My suggestion is that whenever the 3D or 3D Delta modes are active, the temporary or custom reference plane axis should be shown in a grey color and NOT show as X (red), Y (green), and Z (blue) colored arrows. In addition, the previously active World Cartesian reference plane axis should be prominantly shown.