Hi all,

I've used linux on my desktop in the past with great joy and I would like to 
start using it again, but I'm running into some accessibility problems. I'm 
visually impaired, and I need some aids to use a computer. The two things that 
I absolutely depend on are the ability to invert screen colors (black becomes 
white and vice versa) and some way to make the mouse cursor more visible.

I currently use Mac OS, which has a builtin option to invert screen colors, and 
I use a third party application called Pin Point to draw a blue circle around 
the mouse pointer.

As far as I can tell Gnome 3 does not have a builtin option to invert screen 
colors, I have solved this in the past by just using Gnome 2 with Compiz, which 
has a plugin to invert the colors. Also KDE has this feature, so it should be 
no problem to get this working properly.

However, I cannot find a way to make the cursor more visible. I tried to write 
a little c program that can draw a circle around the cursor but I can't get it 
to properly work. On OS X my mouse looks like this [1], the cursor would be 
inside the blue circle, but is not visible in the screenshot.

Anyway, I'm looking for suggestions to solve this problem so I can use Linux on 
my desktop once again.

[1]: 
https://www.dropbox.com/s/65bgyl7wx501szk/Screen%20Shot%202016-05-19%20at%2008.28.13.png?dl=0
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