Male (Retired, so I spend a lot of time here or

)
Curious. You imply opening/closing the MDE is slow.

, thus needing to convert from there.
It is almost instant if there are no changes that cause the book to move (author or title changes).
Note: I tend to use the Hot keys for many tasks. C, E, T, ^D see lots of use.
I know BR shuns the rodent.