ChangeForm slide horizontally

Is there a possibility to change the slide motion when calling ChangeForm from vertical to horizontal?
If not, what’s the best way to implement it by myself?

You might experiment with using the slide functions:

Form1.slideDown(500)
Form2.slideUp(500)

Thanks, but I’d like to slide left or right

Sorry, I misread your question.

Yes, it is possible, but we don’t have code already written to do this. If you google javascript animation you’ll get lots of suggestions.