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CAD tip CAD tip # 6546:

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If you need to create a partially "transparent" toolbar icons, you cannot use standard ways of PNG format with alpha-channel or transparent GIF files - AutoCAD (up to 2014) supports only icons in the BMP format which doesn't work with transparency.

But you can use a trick - the color with the hue of 192-192-192 (RGB) used in BMP icons is interpreted by AutoCAD as "transparent". Since 2015 you can use PNG icons with transparency. Since 2017 the 192,192,192-trick doesn't work anymore and PNG is the only option for transparent icons.

ACAD2009ACAD2008ACLTADT
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24.2.2009    14239×  
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See also:
Tip 14753:Overview of startup parameters for acad.exe and acadlt.exe (runstring)
Tip 14604:QRcode - dynamically generated QR codes in AutoCAD.
Tip 14006:Universal MsgBox in AutoLISP.
Tip 13822:Fast layer visibility toggle ON/OFF.
Tip 13504:How to add own commands to AutoCAD custom palette?
Selected tip: How to change the field delimiter in CSV attribute extract files?


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