Change form of Phaser with command line

Hey, is it somehow possible to change the form of a phasers in a preset with the command line? It should do the same like the Select Form-Tool but be executable from a macro and change the form without activating the preset (If this is possible). I am looking for something like the effect object in MA2 where you can change the form between a low and high value.

Thanks for your answer! So what could I do If I want to change the form of the preset without ruining my programmer? Is it possible to activate a preset for example in a different programmer part, adjust it in there and store/update it? What commands would be necessary to achieve this?