I search a reserved space for thumbwin

[Uriel]

ok i try to explain, i see something like what i search somewhere here but i don't find it....

i use thumbwin that makes littles images of all open windows in my desktop
it is easy to make them come up with a hotkey, but....
i want to see my thumbs little windows allways, so i seach something that will reserve a little space in my windows for that

i use to put the thumbs  in my desktop at the right, and i have a 1920 screen so i have all space i need and more,
in conclusion can i reserve space in my screen for that programme and only for him?

how to do that ?

thanks for your help
best regards
M.