Toad for Oracle 15.1 doesn't remember the size/location of the Describe Objects dialog. It always opens close to full screen (not quite) and on top of the main Toad window.
Thank you for reporting this. It is fixed in the current beta.
I tested in 220.127.116.111 and it's not fixed, is there a newer Beta?
Yes, the newest is 16.0.25.something. Get it here. Toad for Oracle 16.0 Beta
Tested in 16.0.25 and it's fixed. Display sequence is a bit wonky though, I see it appear in default size/location briefly and then it resizes and moves to the saved location.
I see that too. I'll try to solve it.