Protection section.

It this section you may lock some parameters of the object against changing them with the mouse. However, even when locked, this parameters can be still changed in the table, or may be changed when you apply some actions to a group to which the object belong (like resizing - when resizing a group with an object locked against resizing within it, it will be resizes with the entire group, in spite of the protection). The locked handles appear as grey padlocks.

All values of this section are binary values.

LockWidth

Locks the object's width against sizing.

TRUE - the width can't be sized;
FALSE - the width can be sized.

LockHeight

Locks the object's height against sizing.

TRUE - the height can't be sized;
FALSE - the height can be sized.

LockMoveX

Locks the object against moving it horizontally.

TRUE - horizontal movements are prohibited;
FALSE - horizontal movements are allowed.

LockMoveY

Locks the object against moving it vertically.

TRUE - vertical movements are prohibited;
FALSE - vertical movements are allowed.

LockAspect

Locks the object against unproportional resizing.

TRUE - only proportional resizing is possible;
FALSE - both proportional and unproportional resizing is possible.

LockCalcWH

Sets whether the alignment box of the object remains the same after you move a vertex on the object, or changes according to the new object outline.

TRUE - the alignment box remains the same;
FALSE - the alignment box changes according to the new outline.

LockRotate

Locks the object against rotation.

TRUE - the rotation is prohibited;
FALSE - the rotation is allowed.

LockDelete

Lock the object so it cannot be deleted. When you're trying to delete the locked object, it displays a warning that it can't be deleted.

TRUE - the object is protected against being deleted;
FALSE - the object can be deleted.

If you want to protect a large number of objects against being deleted, it's convenient to assign them all to a specific layer, and then lock that layer in the Layer Properties dialog.

LockBegin

Locks the begin point of the object (for 1D objects) against repositioning

TRUE - the point is locked;
FALSE - the point is not locked.

LockEnd

Locks the end point of the object (for 1D objects) against repositioning

TRUE - the point is locked;
FALSE - the point is not locked.

LockVertex

Prevents vertices from being edited with the mouse.

TRUE - the protection is on;
FALSE - the protection is off.

Note: Alternatively, some of these parameters can be changed in the Protection dialog box.