how to use E prime to display symbols and allowing participants to influence their shape?

[Josh]

Im new to using E prime, and although I have the basics down, i have
no idea how I would do this on E prime. In my experiment I need the
participants to be able to increase or decrease the size of a symbols,
and i need to be able to measure what size they make it. I think my
unit of measurement will be in pixels but besides that I have no idea
how I would be able to create this on E prime. Any help would be
great, thanks.

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