I'm on OSX, when I disengage full screen it becomes a larger resolution for some reason so I can only take a picture of what you see. 1. Will I ever be able to disengage full screen while it staying the same resolution? Also while I am at it, it ALWAYS

[iOfStorm 0]

I'm on OSX, when I disengage full screen it becomes a larger resolution for some reason so I can only take a picture of what you see. 

1. Will I ever be able to disengage full screen while it staying the same resolution? Also while I am at it, it ALWAYS crashes whenever I disengage (within a matter of minutes)
2. Can you fix the white part?

Thank you!

Also I tried to upload a screenshot but it doesn't seem to be working so I uploaded it via imgur - https://imgur.com/WED5ahC

[Manu311 92]

The white part/missing background is actually a bug which is going to be fixed soon - as far as I know.

As for your main problem:
Is the resolution-dropdown out of your screen if you open the options in windowed mode? If not: Why not simply change that?
If that doesn't work, there are two ways to manually change the resolution:

1. Option: Open the Console when in windowed mode (Command + F8 I guess), type the following and press return after: SetSave "vid_resolution" "800" "600" "0"
That will set your solution to 800x600 - it might require a restart of HoN, I haven't checked

2. Option: That Video-Resolution from step 1 should be set in the startup.cfg-file in your ~/.Heroes\ of\ Newerth/game directory. But with a different resolution, you can change that line. You have to quit HoN before you do that, since exiting HoN will replace that file.

[iOfStorm 0]

The issue is small but yes, when it is in windowed mode, the resolution stays the same, it would be ideal if it changed to the size and frame of the windowed mode so that I could still do things while having it in windowed mode. 

It's not a huge deal but everytime I want to do something I have to go back into full screen which eventually for some reason, when I go back and forth between full screen and windowed mode - crashes the game. Which sucks if Im at character pick (this is usual)
 

[iOfStorm 0]

Once I pick my character and I have gone in/out of full screen mode, I actually have to exit the entire game and open again in full screen mode only, because as soon as I switch between full screen and windowed mode, it always 100% will eventually crash. Hope this makes sense