New Arrow Command
A new option in the Arrow command "Draw as Curve" allows you to draw arrows as curves instead of straight lines.

New Grid Option
There is a new option in the Grid Options dialog box: "Show CS". This shows a graphical representation of the coordinate axes in the drawing area.

New Option to Turn Off Nested Groups
There is a new option in the General Options dialog box: "Don't use nested groups". If you activate this checkbox, DesignCAD will use its "classic" grouping mechanism from version 15 and earlier. In this situation, groups are not linked to a specific layer, cannot be nested, and do not generate an actual group entity. The setting is application-wide, not per-document. When this option may cause a change in an open drawing's data, you will be warned and can cancel the operation.

New Option to Print Hidden Line as Dash
There is a new option in the "Type" tab of the Print dialog box: "Print hidden line as dash". You can adjust the pen width setting in the Print dialog box for the lines to show faintly or clearly in your printed results.

New BasicCAD additions
• Sys(1140) -- use/don't use nested groups. 0=nested groups, 1 = "old-style" groups.
• Sys(1141) – highest used group index (read-only)
• Sys(1142) – lowest unused group index (read-only)
• Arrow command has new parameter:

• Widened the fields in the coordinate bar to show more digits.
• Importing some dwg files resulted in a long series of "the associativity will be removed" messages. Every attempt to edit or zoom these files resulted in the same sequence of messages. This annoyance has been removed.
• Immediately after importing a dwg file with an Arc dimension, the drawing extents were incorrect and some display anomalies occurred. Saving and re-loading the drawing were required to solve the problem.
• Improved import of DWG files set to Metric units.
• Radius Dimensions sometimes showed display anomalies if using Same As in conjunction with Running Snap Mode.
• Many dimension problems when loading older-version drawings were fixed.
• Exploding a group sometimes resulted in two or more of the remaining group becoming merged into a single group. This has been corrected, and the maximum allowable group id has been increased.
• DesignCAD would not draw dual-tolerance dimensions if the + and – tolerance values were the same. Both values were consolidated into a single +/- tolerance format.
• Sometimes loading drawings that contained a large number of unused blocks would cause DesignCAD to silently close without an error message.
• Could not change Dimension Tolerance type to "None" after choosing Symmetrical or Normal in the Dimension Options dialog box.
• True-Type text in exported wmf files was converted to single letters, which would then appear jumbled.
• Sometimes text in imported dwg blocks was missing or the wrong size.
• Appended dimension units in the dimension text (i.e. ft, in, m, cm, etc) are now optional, rather than automatic.
• Could not re-associate a radius or diameter dimension using the docked info box.
• Dimensions were sometimes displaced in exported PDF file.
• Corrected the calculation of the Offset value in Dimension Baseline command.
• Improved layer control for Paperspace Viewframes.
• BasicCAD – INPUT # statement would sometimes treat negative numeric values in space-delimited text files as an expression rather than as separate values, resulting in incorrect variable assignments.
• BasicCAD – added {SkipLayouts parameter for DwgIn and DxfIn commands to allow the user to specify whether or not to skip layouts when importing.
• BasicCAD – extended dimensions weren't honoring the {Type parameter to create exploded dimensions.
• Clicking on the bottom layer in the layer list in Dimension Options would scroll the layer list, instead of activating the intended control for that layer.
• Improved the Linestyle and Color toolbar behavior to better indicate by-layer or by-entity colors and linetypes. Added LineStyle by Layer button to the Linestyle toolbar, and Color by Layer button to the Color toolbar.
• Intersect-2 was not working correctly when the entities did not actually intersect.
• Browsing for missing by-reference symbols sometimes caused DesignCAD to crash.
• Images could not be copied from PDF files and pasted directly into DesignCAD.
• A DesignCAD session started via Ole Automation would crash when the Print command was issue.
• Allow Saving Empty Drawings moved from Save dialog box to General Options dialog box.
• Improved Snap and Trim accuracy against curve entities.
• Red and blue color channels were swapped when loading some TIFF image files.
• Dimension Baseline offset field added to Dimension Options dialog box.
• Paste button had been removed from the Dimension Options dialog. Now restored.
• Improved XYZ file import.
• Dimensions did not update onscreen after running the Units command. Save and re-load were required.
• Panned viewframes at specific scales no longer shift when new objects are added after the viewframe was set up.
• After re-defining a block, attribute definitions in existing instances of that block name would revert to the default text instead of retaining their original values.