Is there a way to copy a portion of an expression? I find that very often I want to copy the work I’ve already done, instead of entering the expression again from scratch. However, I often only want part of the expression, or I want to enter that expression as just one part of a new expression.
As far as I can tell, it is only possible to copy the entire expression, and paste it as the entire new expression. It would be extremely helpful if there was a way to just copy a selection, instead of the entire expression. Likewise, it would be extremely helpful to insert a copied expression into the middle of a new expression.
Is there a way to do this, or has any thought been given to implement this feature?
I see the following thread, but I think it could still be improved.