Freehand Block Dialog Box

(This function is always available in the Plan View and 3D View. It is also available in the Long and Cross Section views with the Profiles and Design Module.

A Freehand Block can either be defined as a rectangle or a free form shape of up to 500 sides.

If a more precise block is required, or a block that can consist of lines other than straight lines, then a polygon block should be used. (Not available in the 3D View)

Block dialog box

Item	Used to
Shape	Rectangle by Corner Nominate that the block to be created is to be a rectangular shape, defined by two corners. Free Form Nominate that the block to be created is to be a free form shape. Rectangle by Centre Nominate that the block to be created is to be a rectangular shape, defined by the centre of the proposed rectangle and a corner.
Criteria	Set the block region and conditions that define whether an object will satisfy a block or not.
Define	Place a new block and close the dialog box. The dialog box is closed immediately and any changes to the settings are saved. The system is then waiting for you to place the block. If Rectangle by Corner was set, place the block by clicking the accept mouse button at two diagonally opposite corners of the required rectangle in the graphics window. If Free Form was set, place the block by clicking the accept mouse button at the required vertices of the free form shape. Conclude the process by again clicking near the first vertex to close the free form shape. There may be up to 100 vertices. If Rectangle by Centre was set, place the block by clicking the accept mouse button firstly at the centre point of the required rectangle and then one of the corners of the required rectangle in the graphics window. The viewing tools may be used while placing the block.
All	Place a new block which encloses all objects in the data base and close the dialog box. If you wish to define a block that includes all objects in the data base, this button is a fast alternative to using the Define button. Selecting All automatically sets the conditions to Inside and Enclosed.
OK	Save any changes to the settings and close the dialog box and activate the current block.
Off	Turns the current block off. This button is only active if a block is currently defined and active.
Cancel	Close the dialog box without saving any changes to the settings.

If there is a block already defined, its Criteria may be changed at any time, if not in the 3D View. In the 3D View, once a block is defined, selections are automatically calculated and may not be recalculated other than by re-defining the block.

Only one block may exist at any time and it may be made active or inactive by using the block tool.(Not available in the 3D View)