My question has to do with symbol function with the Equation Editor. Recently I tried to recreate a formula that included the summation symbol (sigma sign). It copied sign just fine, but it does not allow me to add indexes or limits - which would give me blue shaded boxes the same way as fractions, root signs, subscripts and superscripts - - these work fine. The sigma sign is missing this function so formulas with it are incomplete.

Any suggestions? Thanks!

James

James Westmoreland

If you are using the equation editor that is part of the Rich Content Editor, then I have advice. If you're using the equation editor that comes with Quizzes.Next, then I don't have a way of testing that, but the other advice might work.

When I need to create limits, I go into the advanced editor. I do not use the summation symbol that is under the basic palette. It may work, but I know enough LaTeX and need enough advanced stuff that it's quicker for me to just type it than try to click it.

I switch to the advanced view where there are no blue boxes available, but you have more control.

To get limits, use the \limits or \displaystyle LaTeX macros.

\limits places the limits above and below the summation instead of to the side.

\displaystyle makes it larger and places the limits above and below the summation.

Here are three examples:

and how they render (in the same order) in Canvas

There is no need to use \limits if you have \displaystyle, but it doesn't hurt other than making it a little longer, while it is clearer (perhaps) to someone looking at the code.

In LaTeX, the two display modes are inline and display. In Microsoft Word nomenclature, that would be linear and professional. \displaystyle makes fractions full-size rather than trying to cram them into a single line. There are other differences between them as well.

Finally, a note about the equation editor. While in the editor itself, it uses display mode, even if you don't have the \displaystyle in there. The equations may also turn out smaller than they look in Canvas.

Here's how the first one displays in Canvas while editing. Notice the limits are above and below the summation symbol, even though they come out after it on the saving it.

This first one, without the \limits or the \displaystyle can also be seen in the Basic View. So when I edited it after saving it, It rendered as basic where I have the blue boxes I can change things.

If I add \limits or \displaystyle to it, then Canvas tells me it cannot be rendered in basic view.

Hope you can figure it out from that.