Can the dualsize be lower?

I use "set dualsize 10" to reduce width of a display in dual-mode instead of hiding it,
but the command will not work if the dualsize is lower than 10

It will work if the window is large enough, but there is a minimum size for each file display, which 10% may be smaller than if the window is small.

the minimum size is about 139 pixels in my computer when dopus is fully displayed
I hope the minimum size can be set to 1% or 10pix or lower
would you consider to add a option to allow it ? thanks
ps:
why I want lower width
because I want to hide one side display instead of closing it,
why not close it ?
because if i close it ,for example ,when close the left side display , when open it again ,it will become right side display , in other word , closing it and open it again will swap the 2 display in-dual mode, I don't like it