I found today’s tip in the July edition of the excellent Michael’s Corner series—I’d never seen this particular option before, and I just love learning new things!
Let’s say you’ve got a stacked fraction in AutoCAD LT 2012:
But you want to modify it. So you highlight it—an obvious first step.
From here, the most obvious second step is to right-click and select “Stack Properties” from the shortcut menu.
But, as Michael discovered, if you left-click on the highlighted fraction, a small arrow appears at the bottom.
Click on that, and you see “Unstack” and “Stack Properties” right there.
From here, you can modify the stack properties or even access the AutoStack feature to control how future fractions are stacked.
Double-clicking on the fraction also brings up the Stack Properties dialog, and works in earlier versions of AutoCAD LT too.

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In AutoCAD 2011, there is no arrow, so you still have to either right-click or click the stacking button, but you can double-click on the highlighted text to bring up the stacking dialog box
Here's a trick for Subscripts and Superscripts: Let's say you want to Subscript text like you would see in the element H2O ("water"). First, enter the following text as seen: H^2O Then, highlight the ^2 characters, then click the a/b stacking button.
To get a Superscript for something like 100.0m2 , enter the text as follows: 100.0m2^ , highlight the 2^ characters, and again, click the a/b stacking button.
Posted by: Murray Clack | July 11, 2011 at 09:57 AM