I was viewing a post on my iPhone (in Safari) which had some MathJax equations, and I accidentally clicked on an equation and opened its MathJax menu:

MathJax menu
Anyone know how I did that?

I can’t seem to find a consistent method to repeat it (though I can get it to open sometimes with a random volley of frustrated taps).

Test Equation
$$\text{Menu}=C_a*T (t_n, t_d) $$

where \$C_a\$ is the coefficient of annoyance,
\$T\$ is the tap sequence as a function of the number of taps \$t_n\$, and the tap delay \$t_d\$.

  • \$\begingroup\$ On PC, right-clicking the equation will open the MathJax menu. Perhaps the equivalent of long-pressing the equation on touch-screen devices? \$\endgroup\$
    – Andrew T.
    Feb 17, 2019 at 7:40
  • \$\begingroup\$ @AndrewT. For me, that just ends up selecting some of the equation’s text. I tried doing so with various pressures as well. \$\endgroup\$ Feb 17, 2019 at 12:13

1 Answer 1


To open the contextual menu on a mobile device, use "double-tap-and-hold", which is a tap followed quickly by a second (long) tap where you continue to hold down until the menu opens.

  • \$\begingroup\$ Works perfectly! \$\endgroup\$ Feb 17, 2019 at 13:09
  • \$\begingroup\$ Well, it doesn’t work in the SE app (which still runs in some compatibility mode, as it hasn’t been updated in years). \$\endgroup\$ Feb 17, 2019 at 16:51

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