Version 2.3b Upgrade Information

1. Fixed bug introduced in Find Intersection (all dependent values zero).
2. [Mac only] Fixed issues with restoring custom color schemes and persisting a switch back to the default color scheme.

1. Differentiable single-variable equations/inequalities (e.g. 1/x - 2 > 0) are now solved and rendered more accurately by a new algorithm that uses Newton's method to find all of the potential solutions and boundaries.
2. Improved display of equation parsing errors to indicate the position of the problem where applicable. The error is displayed in a balloon tooltip (Windows) or popover (Mac/iOS) and you no longer need to dismiss it in order to edit your equation. In addition, the problem area of the equation is selected for you and the bubble "points to" the selection in order to help you identify what's wrong with your equation or function definition.
3. Fixed crash when computing critical points for equations containing an expression like "x+0".
4. Fixed a number of issues with displaying "holes" in graphs and the Find Critical Points dialog box.
5. [Windows only] Improved error reporting when Paste Data Plot fails due to invalid / unavailable clipboard data.

New/improved features

1. The Windows version underwent an "extreme makeover" to bring the UI into the 21st century (and catch up with that of the Mac/iOS versions):
   • The grid is now rendered using anti-aliasing for smoother curves.
   • Semi-transparent shading is used to display inequalities, integrals, and the selected region on the grid.
   • Added two larger sizes of icons for the toolbar, so it is easier to see on very high pixel-density screens used on modern laptops.
   • Right-click on the blank area of the toolbar now brings up a menu which can be used to configure the icon size and whether to show text captions.
   • Light-colored text in the status bar is now outlined in dark gray to make it more readable against the light-gray background.
   • The file open/save commands now use the new Explorer-style dialog boxes.
   • Message boxes for warnings and prompts to save work are now centered over the application window rather than the desktop.
2. More colors! There are now 16 slots for graph colors and a palette of 128 possible colors to choose from.
3. Added the ability to export graphs as JPG or PNG files. See the Edit -> Export Graphs XXX menu items.

Bug fixes

1. Printed tangent line/integral information should always reference the correct entries in the equation list now.
2. Fixed bugs in Pick graph color (strict inequalities were changed from dashed to solid lines and domain endcaps in piecewise-defined functions were not consistently updated)
3. [Mac only] Printing with "Color with White Background" selected for the Printed Color Scheme no longer changes to the standard white color scheme if you have defined a custom color scheme and the background is already white.
4. [Mac only] Fixed rendering of dashed lines for strict inequalities when "Draw graphs with wide lines" option is selected.