CAD tip # 5241:

Question CAD
% platform category

Slow object selection preview highlighting.

AutoCAD 2007 (and higher) previews the selected objects (hoover) by thickening the objects under cursor.

If you are slowed down by this function in large drawings (e.g. on cycling of overlapping objects), you can switch to the classic entity highlighting with dashed lines -- set the PREVIEWEFFECT variable to 0 (the default value is 2). You can also set this value using the dialog Options > Selection > Visual effects > Selection preview. With the "Advanced options" button you can exclude some complex (slow) object types (e.g. xrefs, mtexts, tables) from the selection preview.

ACAD2010ACAD2008ACAD2007ADT2007

* CAD

19.10.2006 24126×

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applies to: AutoCAD 2010 · AutoCAD 2008 · AutoCAD 2007 · AutoCAD Architecture 2007 ·

See also:
Tip 14075:	Overview of CAD formats supported in Inventor 2025 (import/export/AnyCAD).
Tip 13965:	Total length of sweeps in Inventor - wires, pipes, trusses, tubes, hoses (iLogic)
Tip 13800:	Visually compare 3D geometry in CAD and BIM files.
Tip 13749:	How to add the SEARCH/REPLACE command into AutoCAD Web?
Tip 13227:	Reference Explorer - quick analysis of your project or assembly (file size, xref errors).

Selected tip: FATAL ERROR: Unhandled Access Violation Reading 0x0054 Exception at 72c214h

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