I tried to add inline equations and got a t and the cursor running to far right of the window. where I should input the equation?

how to add inline equation?

@Charlie is this with the version 1.0.24? The inline equation should show up as a placeholder where you can click it to open up a popover where you can enter the math in.
CEO & Cofounder of Manuscripts.app Ltd
http://twitter.com/mz2 
@Charlie we've made this clearer now for the upcoming 1.0.25 by opening up the inline equation popover as soon as you add an inline equation via the Insert menu.
CEO & Cofounder of Manuscripts.app Ltd
http://twitter.com/mz2 
Thanks. I closed the app and restarted it to get everything ok. When will we can write $..$ to add inline ?