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430 Chapter 6: Transforms: Moving, Rotating, and Scaling Objects
Preferences > General tab > Reference Coordinate
System group > Constant.
The axis constraints are stored separately at
object and sub-object levels. If you set these
three controls one way while in sub-object mode
and another way while in objec t selection le vel,
when you return to sub-object mode, they’re
restored to the way they were previously set. For
example, if you’re using XY constraints at object
level, then switch to sub-object level and use Z
constraint, when you return to object level, XY
will be restored.
Snaps can conflict with Restrict To Z. Go to
Customize menu > Grid And Snap Sett ings
> Options > Translation to find the Use Axis
Constraints check box. When this is off, Snaps
take precedence over axis constraints.
Restrict To Plane Flyout
Axis Constraints toolbar > Restrict to Plane flyout
The Restrict To Plane flyout, available from the
Axis Constraints toolbar (page 3–735) ,letsyou
limit all transformations (move, rotate, sc ale) to
the
XY (page 1–430) , YZ (page 1–431) ,or ZX
(page 1–431)
planes (by default, parallel with the
Top view). Alternatively, you can cycle through
the planar constraints (XY, YZ, ZX) by repeatedly
pressing the F8 key.
You can also select planar constraint by using the
Move Transform Gizmo (page 1–408) . Instead of
dragging one of the axis indicators, drag one of the
plane indicators near the center of the gizmo.
When you m ove an object a long a plane that is
head-on to your v iew, the object moves along the
singleavailableaxisshownintheview.
Note: Constraintsaresetonatransform-by-
transform basis, so select the transform before you
select the axis constraint. If you do not want t he
constraints to change, turn on Customize menu >
Preferences > General tab > Reference Coordinate
System group > Constant.
The axis constraints are stored separately at
object and sub-object levels. If you set these
three controls one way whi le in sub-object mode
and another wa y while in object selection level,
when you return to sub-object mode, they’re
restored to the way they were previously set. For
example, if you’re using XY constraints at object
level, then switch to sub-object level a nd use Z
constraint, w hen you return to object level, XY
will be restored.
Restrict To XY Plane
Axis Constraints toolbar > R estric t to XY Plane (on Restrict
to Plane flyout)
Keyboard > F8 (cycles through plane constraints)
Restrict To XY Plane lets you limit all
transformations (move, rotate, scale) to the XY
axes (by default, parallel with the Top view).
You can als o select planar constraint by using
the
Transform gizmo (page 1–408) . Instead of
clickingthetripodheads,choosethecornermarks
that are part of t he gizmo. You can cycle through
constraints by select ing the other sets of corner
marks to choose the alternate planes.
When you m ove an object a long a plane that is
head-on to your v iew, the object moves along the
singleavailableaxisshownintheview.