Where is grapher pop-up menu (piecewise functions)?

Hi,

I am struggling to learn Grapher, and the only documentation I found is the help file.

I want to enter a piecewise defined function. The help file says:

1- Choose Equation > New Equation.
2- Choose Condition from the pop-up menu next to the Equation field.
3- Enter the number of conditions in the equation.
4- Enter the conditions and expressions in the template.

I am stuck a step 2: where is the said pop-up menu? I tried the equation column on the left. The contextual pop-up menu there (right-click) only has "Reevaluate expression". I tried the equation editing area at the top. The contextual pop-up menu there (right-click) only has "Copy as" and "Copy LaTeX expression". At the far right of that area there is also a menu (as identified by a downward-pointing triangle), which only contains maths templates. At the very bottom left, an action menu contains new {equation, point set, group}.

In short, I cannot find the pop menu supposed to contain the condition item.

What did I miss?

Many thanks,

Jean-Denis