With the exception of the Text Editor, single clicking is now used universally for selection. When working with tool output you can still highlight a portion of a variable by dragging over it and the selection will occur when you release the mouse button.
Sketch Sizing
Sketch sizing of variable names and shapes is now continuous and anchors the upper left (top center for some shapes and center for rates) instead of the center. This makes it easier to adjust sizes and also allows you to see the word wrapping that will occur as you adjust the size of the shape around a variable.
Related to this the Run name window on the top toolbar is larger and may resize when you adjust Vensim's window size.
Model Comparison
On the Model menu select Compare To... to compare the model you have open to another model. This is a useful way of seeing small changes in model structure, equations or comments. The output is a simple report listing the changes that have been found.
Delay Dashes
The delay markings on arrows are now rendered as double dashes to make them more consistent with standard practice.
Function List (in Equation editor)
The function list in the equation editor now displays arguments when you click on a function name. To bring the function name into the equation click on the Add Sel button or press the Enter key.
Model Setting
This dialog has been rearranged somewhat.