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With OsnapzBG Plus loaded any change of the AutoCAD variable OSNAPZ will also change the drawing window colors depending on if OSNAPZ is set to 0 or 1.

OsnapzBG Plus is based on our freeware OsnapzBG but adds ability to set any of the drawing window colors like those in the 3D parallel projection, 3D perspective projection or the command line context and interface elements.

Here is what it look like in AutoCAD Architecture. “Replace Z value with current elevation” is a button on the application status bar.

It is the system variable OSNAPZ that holds this setting. OSNAPZ was introduced in AutoCAD 2006 and with OSNAPZ set to 1 anything you snap to only uses the current elevation as z value. OSNAPZ controls whether object snaps are automatically projected onto a plane parallel to the XY plane of the current UCS at the current elevation. OSNAP command or OSMODE system variable in AutoCAD sets running object snap modes.

When installed as an AutoCAD app OsnapzBG Plus shows up on the Add-ins tab and gives quick access to also change the value of OSNAPZ.

OsnapzBG Plus

Have any Drawing Window Colors changed based on the OSNAPZ value.

AutoCAD drawing window colors

Usage of OsnapzBG Plus where drawing windows colors are changed when OSNAPZ is changed.

OsnapzBG Plus usage



To test how it works you can download OsnapzBG freeware that is limited to what colors can be set and changed.

For AutoCAD 2013 and newer purchase and download OsnapzBG Plus as an AutoCAD app on Autodesk App Store site.

If purchase has been done via Autodesk App Store the download is available on My Downloads page. Sign in with the same account used when purchasing.

Customers can contact us directly for access to download the full version.


Subscribe to our OsnapzBG Plus newsletter or any of our other Newsletters.

System requirements

Compatible with AutoCAD 2013, AutoCAD 2014, AutoCAD 2015, AutoCAD 2016, AutoCAD 2017AutoCAD 2018 and AutoCAD 2019. All flavors based on AutoCAD should be working like AutoCAD Architecture (ACA), AutoCAD Civil 3D, AutoCAD Electrical , AutoCAD Map 3D, AutoCAD Mechanical, AutoCAD MEP (AMEP, ABS), AutoCAD P&ID, AutoCAD Plant 3D.

Compatible with those operating systems AutoCAD runs on like Windows 8, Windows 8.1 and Windows 10.
Older Windows versions might also work but are not directly supported.

JTB World is an Autodesk Authorised Developer



2 USD for one license of OsnapzBG Plus or less depending on the quantity of licenses.

If you have really many users that you want to give access to this software we can discuss a discounted price based on your particular situation. Educational discounts available.

The license is perpetual and support is included. If you have more than one computer and you are the only user of the application one license is enough.

Purchase OsnapzBG Plus from the Autodesk App Store site or by contacting us.

If purchase has been done via Autodesk App Store the download is available on the Autodesk App Store My Downloads page. Sign in with the same account used when purchasing.

Available payment methods depending on country where payment is done from: Local Bank Transfer (Canada), Wire Transfer to Canada, Interac e-Transfer, Cheque (to Canada). Via BlueSnap (Global Payment Gateway) these methods may be available (not a complete list as it is updated from time to time by BlueSnap): Credit card (Visa, Master Card, American Express, Discover, Diners Club, JCB, Carte Bleue), PayPal, Local Bank Transfer, Wire Transfer, Real-time Bank Transfer, Electronic Check (ECP), Apple Pay, Skrill (Moneybookers), WebMoney, SEPA (Single Euro Payments Area) Direct Debit, Sofort, Giropay, iDeal and Alipay (SEPA (Single Euro Payments Area) Direct Debit, PaySafeCard, Ukash, cashU, Boleto Bancario, Boleto Bancario can be made available upon request) - Refund policy



Use the installer that also puts the app on the Add-ins Ribbon tab (Plug-Ins tab in older AutoCAD versions).


OsnapzBG Plus

 Set the drawing windows colors you want to use for OSNAPZ=0 and run the SetOsnapzColors0 command or use the button on the Plug-ins/Add-ins Ribbon tab.

 Set the drawing windows colors you want to use for OSNAPZ=1 and run the SetOsnapzColors1 command or use the button on the Plug-ins/Add-ins Ribbon tab.

AutoCAD drawing window colors

Now when OSNAPZ is changed the drawing window colors will change accordingly.

OSNAPZ set to 0

OSNAPZ set to 1 - This will replace Z value with current elevation.

OsnapzBG Plus usage 

See also this blog post: OSNAPZ changes can change your AutoCAD screen background with the OsnapzBG freeware 

Supported colors

Contexts: 2D model space, Sheet / layout, 3D parallel projection, 3D perspective projection, Block editor, Command line and Plot preview

Interface elements (Including support for Tint for X, Y, Z):
Uniform background
Viewport control
Grid major lines
Grid minor lines
Grid axis lines
Autotrack vertor
2D Autosnap marker
3D Autosnap marker
Dynamic dimension lines
Rubber-band line
Drafting tool tip
Drafting tool tip contour
Drafting tool tip background
Control vertices hull
Light glyphs
Light hotspot
Light falloff
Light start limit
Light end limit
Camera glyphs color
Camera frustum/frustum plane
Camera clipping planes
Light Web (missing file)
Light shape (extended source)
Lux at distance
Paper background
Top of sky background
Background sky horizon
Background ground origin
Background ground horizon
Bottom of earth background
Background earth horizon
Command history background
Command history text
Active prompt background
Active prompt text
Temporary prompt background
Temporary prompt text
Command option keyword
Command option background
Command option highlighted

Known issue is that the Light Web color is defaulted to 1,0,0. Please contact us if you want us to prioritize a fix for this.

License agreement

The license agreement is found here.

Version History

  • 2018-03-22 - version 1.2 update
    • Added Autodesk® AutoCAD® 2019 support.
  • 2017-06-02 - version 1.2
    • Changes of Auto Snap Marker to white incorrectly fixed as well as a few other minor issues.
    • Support for more color elements.
  • 2017-03-21 - version 1.1. update
    • Added Autodesk® AutoCAD® 2018 support.
  • 2016-11-03 - version 1.1
    • Bugs fixed that could cause some colors to be forced to black and some colors not being set.
  • 2015-07-20 - version 1.0
    • First version. Based on the free OsnapzBG but adds ability to set any of the drawing window colors.


Carpenter Oak Ltd.

More customers are found here.

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Contact us for any questions, wishes or comments.