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TurboCAD 3.0 Readme 
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This Readme file contains the latest technical information on TurboCAD 
3.0. Please read this information before using TurboCAD, especially if 
you are upgrading from a previous version. This document includes the 
following sections. 

Upgrade Information for TurboCAD 2.0 Users 
Converting TurboCAD 1.0 Drawings
Customizing File Open and Save As
DXF and DWG R12 Support
HP LaserJet Driver
ATI Mach 64 Video Board/Driver
Keyboard Shortcuts
Errata to User Manual

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Upgrade Information for TurboCAD 2.0 Users 
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Please note that when you install TurboCAD 3.0, it does not remove or 
update your copy of TurboCAD 2.0. TurboCAD 2.0 remains on your 
system, and you can continue to use both programs.

2.0 Drawings
------------------------
TurboCAD 3.0 can open TurboCAD 2.0 files, but once the files are saved 
in 3.0, you will not be able to reopen them in 2.0. To safeguard your 2.0 
drawings, you should make a separate copy of them in a separate directory 
for use with 3.0., retaining your original copies to use with 2.0.

Removing TurboCAD 2.0
---------------------------------
If you wish to remove TurboCAD 2.0 from your system after installing 
TurboCAD 3.0, you can do so by following these steps:

1. Before you delete your TurboCAD 2.0 directory, move any drawings or 
symbols that you need to another directory.
2. Delete your TurboCAD 2.0 directory. (The default installation directory 
is c:\tcadwin.) 
3. Delete the tcadwin2.ini file from your Windows directory.
 
Digitizer support 
------------------------
Release 3.0 of TurboCAD does not provide support for digitizers, but this 
functionality will be available in a future release.

Line widths
------------------------
TurboCAD 2.0 line widths are measured in pixels (screen or printer) on a 
scale from 0 to 15. TurboCAD 3.0 line widths can be measured in either 
device units, or in world units. When you open a TurboCAD 2.0 drawing 
in TurboCAD 3.0, line widths are converted from pixels to a close 
approximation of the same width in device units.

Hatches
------------------------
In TurboCAD 3.0 you hatch selected objects, rather than defining the area 
of the hatch. If you want to hatch an area rather than a selection, you can 
draw a polygon to define the area, select and hatch the polygon, then 
delete the polygon. 
 
Symbols
------------------------
TurboCAD 3.0 no longer uses .SLW symbols, but it can convert .SLWs 
into its new symbol format. Please see Appendix A of the User Manual for 
details. 

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Converting TurboCAD 1.0 Drawings
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To convert TurboCAD 1.0 files to 3.0, you will need to use a copy of 
TurboCAD 2.0. If you need a copy of TurboCAD 2.0 for this purpose you 
can obtain one at no charge. Call IMSI Sales at (800) 833-8082. To 
convert the drawing files, follow these steps:

1. Install a copy of TurboCAD 2.0 on your system. 
2. Open your 1.0 drawings in TurboCAD 2.0, and save them in a separate 
directory. 

These files can then be opened and saved by TurboCAD 3.0.

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Customizing File Open and Save As
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The User Manual does not currently document the Setup button on the 
File|Open and File|Save As dialogs. This feature allows you to select 
between faster save/load time and smaller file size when saving .TCW 
files. Part of this is accomplished by allowing full or half precision saves.

This feature also allows you to customize the import and export of .DXF, 
.DWG, .MDL, and .PLT files. If you find that opening or saving a 
particular file does not work as expected, or if you want to get finer 
control over the open or save process, you can click the Setup button and 
make modifications to the import or export filter settings. You may need 
to experiment with these settings for a while before getting the results you 
want, depending on the source of your files.

A Model Space Viewport option is available in the import filter dialogs if 
you are opening a .DXF, .DWG, or .MDL file. If this option is checked, a 
representation of each Paper Space viewport in the foreign drawing will be 
imported into TurboCAD as a separate insertion of a single Model Space 
block.

Changes that you make to these settings are persistent, meaning that they 
will remain in effect until you change them back. You can restore the 
factory settings by clicking the Set Default button on the import or export 
filter dialog.
 
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DXF and DWG R12 Support
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TurboCAD's .DXF and .DWG filters support the AutoCAD R12 version 
of these file formats. TurboCAD will not save features of drawings that 
are not supported by R12 .DXF and .DWG (for example, embedded OLE 
objects). Future releases of TurboCAD will support R13 .DXF.
 
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HP LaserJet Driver
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If you are having problems with an earlier (pre-1994) HP LaserJet printer
driver, you will need to set options in the File|Print Setup|Options dialog
(or, in Windows 95, the File|Print Setup|Properties dialog) to print from
TurboCAD. Do one of the following:

-- Set the resolution to 300 DPI
-- Set the resolution to 600 DPI, then switch on "Raster Graphics" and 
"TrueType as Graphics"

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ATI Mach 64 Video Board/Driver
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This release of TurboCAD has a known incompatibility with the ATI 
Mach 64 video board/driver. Under certain conditions specific characters 
disappear from the screen. This defect is purely cosmetic and 
nondestructive of data. We believe that the problem is related to font 
caching in this video driver.

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Keyboard Shortcuts
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To find information on "hidden keys," refer to page 125 of the User 
Manual (Changing Focus with the Keyboard) and pages 291-295 (Quick 
Reference Pages). You may want to add these items to the index of the 
User Manual for future reference.

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Errata to User Manual 
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This section lists known errors and omissions in the first printing of the 
User Manual. 

Page 20, bottom; for "one foot long" read "five feet long". 
Page 28, bottom; for "View|Symbols" read "View|Symbol Library". 
Page 49, bottom, for "Range" read "Pages".
Page 59, caption; for "Rubber Stamp" read "Make a Copy". 
Page 101, bottom; for "Views property sheet" read "General property 
sheet". 
Page 102, top; for "Views property sheet" read "General property sheet". 
Page 262, caption; for "Orthogonal, isometric, and polar" read 
"Orthogonal and polar" 
Page 289, top; for "BATH001.TCW, BATH002.TCW" read 
"BATH1001.TCW, BATH1002.TCW" 
