Search criteria clears when changing source types

Hello,
One thing that annoys me a bit about searching is that it gets cleared when you change the source type.
For example, I might have it on emails initially and type in what I'm searching in the top edit box. I then realize I really wanted to search documents and then click that but the search box cleared and I need to type it in again.
I've tried using the "everything" type to overcome this issue but then the columns aren't the same for email (eg Subject) compared to documents etc. So then you need to muck around with the columns.
If the application didn't clear the search when changing the source type I think the usability would be much better.
Regards,
Peter.
One thing that annoys me a bit about searching is that it gets cleared when you change the source type.
For example, I might have it on emails initially and type in what I'm searching in the top edit box. I then realize I really wanted to search documents and then click that but the search box cleared and I need to type it in again.
I've tried using the "everything" type to overcome this issue but then the columns aren't the same for email (eg Subject) compared to documents etc. So then you need to muck around with the columns.
If the application didn't clear the search when changing the source type I think the usability would be much better.
Regards,
Peter.