Please add a show/hide option in the menu to toggle on/off the 4 buttons that appear over each thumbnail when the mouse hovers over them in the contact sheet. When the thumbnails are small, the buttons obscure the image itself, and become difficult to avoid when clicking around the GUI.
In addition, it can be quite jarring to see the buttons tracking around with the mouse as it glides across thumbnails. I stare at a screen for hours organizing photos for my job, and when I'm focused on one thumbnail, and move my mouse, it draws my attention to the refreshing icons on the screen and can be very hard to keep my eyes where they were focused.
I'm sure these buttons are useful to some, but it would really improve quality of life for some users that find this to be a distraction and stressor to be able to disable it.
Here is an example of the compressed buttons (attached)