It seems like there's a misunderstanding. You're likely asking about how to change the state of an electroscope, not how to "change" the electroscope itself.

Here are the two main ways to change the state of an electroscope:

1. Charging by Conduction: This involves directly touching the electroscope with a charged object. The charge from the object will transfer to the electroscope, causing its leaves to either diverge or converge, depending on the type of charge.

2. Charging by Induction: This method involves bringing a charged object near the electroscope without actually touching it. The charged object will induce a separation of charges within the electroscope, causing its leaves to diverge. This method doesn't transfer any charge permanently to the electroscope.

Let me know if you have any other questions about electroscopes!