Display Commands

About 2 min

Display Commands

Display commands are used to control the view, refresh the display, and adjust display order.

ZOOMEXTENTS - Zoom to Extents

Scales the view to display all graphic objects.

Command name: ZOOMEXTENTS
Alias: ZE

Usage

Command: ZOOMEXTENTS

Features

Automatically calculates the extent of all objects
Adjusts the view to display all content
Leaves appropriate margins

Shortcut

The same effect can usually be achieved by double-clicking the middle mouse button.

ZOOMFACTOR - Zoom Factor

Sets the zoom scale factor.

Command name: ZOOMFACTOR

Usage

Command: ZOOMFACTOR
Enter zoom factor <1.0>: <enter value>

Description

Value > 1: Zoom in
Value < 1: Zoom out
Value = 1: No change

FITMAPVIEW - Fit Map View

Adjusts the view to fit the map display.

Command name: FITMAPVIEW

Usage

Command: FITMAPVIEW

Use Cases

Used for GIS or map-related graphic display.

PLAN - Plan View

Switches to plan view (top view).

Command name: PLAN

Usage

Command: PLAN
Enter option [Current UCS(C)/UCS(U)/World(W)] <Current UCS>: <select>

Options

Option	Description
`C`	Plan view of current UCS
`U`	Plan view of specified UCS
`W`	Plan view of World Coordinate System

REGEN - Regenerate

Regenerates the graphic display of the current viewport.

Command name: REGEN
Alias: RE

Usage

Command: REGEN
Regenerating model.

Features

Recalculates the display of all objects
Updates curve smoothness
Refreshes display cache

Use Cases

After modifying system variables
When display abnormalities occur
When curve precision needs to be updated

REGENALL - Regenerate All

Regenerates the graphic display of all viewports.

Command name: REGENALL
Alias: REA

Usage

Command: REGENALL
Regenerating model - all viewports.

Difference from REGEN

Command	Scope
`REGEN`	Current active viewport
`REGENALL`	All viewports

DRAWORDERBACK - Send to Back

Moves selected objects to the back of the display order (behind other objects).

Command name: DRAWORDERBACK

Usage

Command: DRAWORDERBACK
Select objects: <select objects to send to back>

Use Cases

Place hatch patterns behind lines
Adjust the display hierarchy of overlapping objects

DRAWORDERFRONT - Bring to Front

Moves selected objects to the front of the display order (in front of other objects).

Command name: DRAWORDERFRONT

Usage

Command: DRAWORDERFRONT
Select objects: <select objects to bring to front>

Use Cases

Place text above hatches
Ensure important objects are visible

Display Order Details

Display Order Hierarchy

The display order of objects determines visibility when overlapping:

Frontmost: Displayed last, covers other objects
Middle layer: Normal display
Backmost: Displayed first, covered by other objects

Layer Display Order

In addition to individual objects, the display order of entire layers can be controlled:

LAYDRAWFRONT
<select object>   // Bring that layer to front

LAYDRAWBACK
<select object>   // Send that layer to back

View Operation Shortcuts

Operation	Shortcut
Pan	Middle mouse button drag
Zoom	Mouse scroll wheel
Zoom to Extents	Double-click middle button
Window Zoom	Ctrl + scroll wheel selection

Display Performance Optimization

Reducing Regeneration

Frequent REGEN calls can affect performance. Optimize with the following approaches:

Use REGENAUTO to control automatic regeneration
Turn off layers that don't need to be displayed
Use proxy graphics to display complex objects

Display Precision

Curve display precision is controlled by the following variables:

Variable	Description
`VIEWRES`	Display precision of circles and arcs
`FACETRES`	Display precision of surfaces

Variable	Description
`VIEWCTR`	Current view center point
`VIEWSIZE`	Current view height
`EXTMIN`	Drawing extent minimum point
`EXTMAX`	Drawing extent maximum point
`LIMMIN`	Drawing limits minimum point
`LIMMAX`	Drawing limits maximum point

Script Examples

; Draw graphics
LINE
0,0
1000,0
1000,800
0,800
C

; Create hatch
HATCH
<interior point>


; Adjust display order
DRAWORDERBACK
<select hatch>


; Zoom to extents
ZOOMEXTENTS

; Regenerate
REGEN

Next Steps

System Commands - File operations and system control
Property Commands - Modify object properties
Command Reference - View all commands