You click an object.

You click a second object.

The first object immediately becomes deselected.

Instead of building a selection set, AutoCAD keeps replacing the current selection.

In almost every case, this behavior is caused by a changed system variable, a selection setting, a script, or a problematic drawing. It is rarely caused by a damaged AutoCAD installation.

This guide walks through every known cause, from the fastest fix to advanced drawing repair methods.

Quick Fix

If AutoCAD only allows you to select one object at a time:

Step 1

Type:

PICKADD

Press Enter.

Step 2

Type:

Press Enter.

Step 3

Type:

PICKFIRST

Press Enter.

Step 4

Type:

Press Enter.

For most users, the problem is resolved immediately.

Symptoms, Causes, and Fixes

Symptom	Most Likely Cause	Solution
Only one object can be selected	PICKADD = 0	Set PICKADD = 2
Must hold Shift to select multiple objects	PICKADD = 0	Set PICKADD = 2
Selected objects lose grips unexpectedly	PICKFIRST = 0	Set PICKFIRST = 1
Selection behaves differently in only one drawing	Drawing corruption	Run AUDIT, PURGE, and WBLOCK
Overlapping objects are difficult to select	SELECTIONCYCLING enabled	Disable temporarily
Selection windows behave strangely	PICKDRAG modified	Restore PICKDRAG = 0
Lasso selection appears unexpectedly	PICKAUTO setting	Set PICKAUTO = 5
Entire groups select together	PICKSTYLE enabled	Toggle Group Selection

Fix 1: Check the PICKADD System Variable

The most common cause is PICKADD.

When PICKADD is set to 0, every new object replaces the previous selection.

Instead of accumulating objects, AutoCAD keeps creating a new selection set.

Method A: Command Line

Step 1

Type:

PICKADD

Press Enter.

Step 2

Enter:

Press Enter.

Understanding PICKADD Values

Value	Behavior
0	Each new selection replaces the previous selection
1	Each new selection is added to the selection set
2	Same as value 1, but also preserves objects selected through the SELECT command after the command ends

Example

With PICKADD = 1:

Run SELECT
Select several objects
Press Esc

The selection disappears.

With PICKADD = 2:

Run SELECT
Select several objects
Press Esc

The objects remain selected with active grips, ready for another command.

For most production environments, PICKADD = 2 is the preferred setting.

Method B: Properties Palette

Some users prefer a visual method instead of typing system variables.

Step 1

Open the Properties palette.

Windows

CTRL + 1

Mac

CMD + 1

Step 2

Look at the upper-right corner of the palette.

Depending on the AutoCAD version, you may see:

A cursor icon with a +
A cursor icon with a 1

Step 3

Click the icon.

This toggles PICKADD between normal multi-selection mode and single-selection mode.

Note that this interface element is not available in every AutoCAD release.

Why Does AutoCAD Require Shift to Select Multiple Objects?

When PICKADD = 0, AutoCAD reverses the normal selection behavior.

Instead of:

Click = Add object

You get:

Click = Replace selection
Shift + Click = Add object

This is why many users suddenly believe multi-selection is broken.

In reality, AutoCAD is simply operating with a different PICKADD value.

Fix 2: Verify Selection Settings in Options

AutoCAD includes a selection preference that can override normal behavior.

Windows

Step 1

Type:

OPTIONS

Step 2

Open the Selection tab.

Step 3

Locate:

Use Shift to add to selection

Step 4

Make sure the checkbox is unchecked.

Step 5

Click Apply.

Step 6

Click OK.

AutoCAD for Mac

Step 1

Type:

PREFERENCES

Step 2

Open the Selection settings.

Step 3

Verify that Shift-based selection behavior is not enabled.

Fix 3: Verify PICKFIRST

PICKFIRST controls noun-verb selection.

Without it, AutoCAD cannot properly maintain selection sets before commands are started.

Step 1

Type:

PICKFIRST

Press Enter.

Step 2

Enter:

Press Enter.

Expected Behavior

You should be able to:

Select objects first
Launch MOVE afterward
Launch COPY afterward
Launch ROTATE afterward
Press Delete directly

Fix 4: Restore PICKDRAG

Many users accidentally change PICKDRAG and then assume object selection is malfunctioning.

The classic AutoCAD behavior uses:

PICKDRAG = 0

This is also the default setting.

Step 1

Type:

PICKDRAG

Step 2

Press Enter.

Step 3

Enter:

Step 4

Press Enter.

Understanding PICKDRAG

Value	Behavior
0	Traditional AutoCAD selection windows
1	Click-and-hold drag behavior similar to graphics applications

Most users are more comfortable with PICKDRAG = 0.

Fix 5: Disable Selection Cycling Temporarily

Selection Cycling can make selection appear inconsistent when multiple objects overlap.

Step 1

Type:

SELECTIONCYCLING

Step 2

Press Enter.

Step 3

Enter:

Step 4

Press Enter.

Step 5

Test selection again.

Restore Later

If desired:

SELECTIONCYCLING
2

Fix 6: Check PICKAUTO and Lasso Selection

Some users report selection problems when AutoCAD suddenly starts drawing irregular freeform selection shapes.

This is usually the Lasso Selection feature.

Step 1

Type:

PICKAUTO

Step 2

Set the value to:

Alternative Method

Open:

OPTIONS

Navigate to:

Selection

Disable:

Allow Press and Drag for Lasso

Fix 7: Check Group Selection (PICKSTYLE)

Sometimes selecting one object automatically selects many other objects.

This is often caused by Group Selection.

Step 1

Type:

PICKSTYLE

Step 2

Check the value.

Quick Toggle

Windows

CTRL + H

Mac

CMD + SHIFT + H

This toggles Group Selection on and off.

Recommended Selection Settings

For most AutoCAD users:

Variable	Recommended Value
PICKADD	2
PICKFIRST	1
PICKAUTO	5
PICKDRAG	0
SELECTIONCYCLING	2 or 0
PICKSTYLE	Depends on workflow

Fix 8: Use System Variable Monitor

If the problem keeps returning, another routine may be changing your settings.

Common sources include:

AutoLISP files
Startup scripts
Third-party plug-ins
Legacy customization packages

Step 1

Type:

SYSVARMONITOR

Step 2

Press Enter.

Step 3

Verify that PICKADD is monitored.

Step 4

Set its preferred value to:

Step 5

Add PICKFIRST to the monitored list.

AutoCAD will warn you whenever those values change.

Why Does This Happen Only in One Drawing?

If every other drawing works correctly, the problem is usually stored inside the DWG file itself.

Possible causes include:

Corrupted objects
Corrupted block definitions
Proxy objects
Imported CAD standards
Damaged dictionaries
Vertical application data
Embedded AutoLISP routines

In these situations, changing PICKADD may not completely solve the issue.

Fix 9: Audit the Drawing

Always begin by checking the drawing database.

Step 1

Type:

AUDIT

Step 2

Press Enter.

Step 3

When prompted:

Fix any errors detected?

Enter:

Step 4

Allow AutoCAD to repair the database.

Fix 10: Purge Registered Applications

RegApp bloat frequently causes strange DWG behavior.

Step 1

Type:

-PURGE

Step 2

Press Enter.

Step 3

Type:

Step 4

Press Enter.

Step 5

Type:

Step 6

Press Enter.

Step 7

Confirm the purge.

Fix 11: Export Clean Geometry Using WBLOCK

This is one of the most effective methods for repairing a problematic drawing.

Unlike ordinary copy-paste operations, WBLOCK rebuilds much of the drawing database.

Step 1

Open the problematic drawing.

Step 2

Type:

WBLOCK

Step 3

Under Source, choose:

Objects

Step 4

Click:

Select Objects

Step 5

Select only the valid project geometry.

Avoid:

Entire Drawing

when corruption is suspected.

Step 6

Specify a new file name.

Step 7

Save the new DWG.

Step 8

Open the new file and test selection behavior.

Fix 12: Test a Clean Drawing

This determines whether the problem belongs to AutoCAD or the DWG file.

Step 1

Create a new drawing using:

acad.dwt

acadiso.dwt

Step 2

Draw several simple objects.

Step 3

Test multi-selection.

Results

Result	Meaning
Multi-selection works	Original DWG is damaged
Multi-selection still fails	AutoCAD settings, profile, or add-in issue

Advanced Troubleshooting

If all previous fixes fail, investigate the AutoCAD environment itself.

Reset Your AutoCAD Profile

Step 1

Type:

OPTIONS

Step 2

Open the Profiles tab.

Step 3

Create a new profile.

Step 4

Test selection behavior.

Disable Third-Party Add-ins

Temporarily disable:

AutoLISP startup files
ARX applications
Custom toolsets
Plug-ins
Automation scripts

Check QAFLAGS

A damaged QAFLAGS value can interfere with commands, scripts, and selection behavior.

Step 1

Type:

QAFLAGS

Step 2

Press Enter.

Step 3

Verify the value.

The normal value is:

If another value appears and you are not intentionally using debugging functions, reset it to:

AutoCAD LT Users

All fixes in this article apply to AutoCAD LT.

The following variables behave the same way in AutoCAD and AutoCAD LT:

PICKADD
PICKFIRST
PICKAUTO
PICKDRAG
SELECTIONCYCLING
PICKSTYLE

If AutoCAD LT can only select one object at a time, start with PICKADD.

Frequently Asked Questions

Why can I only select one object at a time in AutoCAD?

The most common cause is PICKADD = 0, which forces every new selection to replace the previous selection.

How do I turn on multiple selection in AutoCAD?

Type:

PICKADD

Set the value to:

Why does AutoCAD require Shift to select multiple objects?

This almost always happens because PICKADD has been changed to 0.

Why does AutoCAD draw a freeform shape instead of a selection rectangle?

The Lasso Selection feature is enabled. Set PICKAUTO = 5 or disable Lasso in the Selection Options.

Why does selecting one object select several objects?

Check PICKSTYLE and Group Selection settings.

Does this issue affect AutoCAD LT?

Yes. AutoCAD LT uses the same selection variables and can experience the same symptoms.

Final Diagnostic Checklist

Verify the following:

PICKADD = 2
PICKFIRST = 1
PICKAUTO = 5
PICKDRAG = 0
SELECTIONCYCLING configured correctly
PICKSTYLE verified
Use Shift to add to selection disabled
AUDIT completed
RegApps purged
WBLOCK test completed
Clean drawing tested
QAFLAGS = 0
Third-party add-ins disabled if necessary

In most cases, correcting PICKADD restores normal multi-selection immediately. When it does not, the cause is usually a damaged drawing, a modified profile, or a customization that is changing AutoCAD’s selection variables in the background.