Background:
Ultimately, I'm trying to set up a custom one handed keyboard layout similar to this demo(click one-handed typing demo).
XKB is used in many linux distros. Wikipedia has a decent description of xkb.
In human-computer interfaces, the X keyboard extension or XKB is a
part of the X Window System that extends the ability to control the
keyboard over what is offered by the X Window System core protocol.
The main features of this extension are:
Unfortunately to achieve this functionality I must make the space bar a modifier.
The Question:
How would you set up the space key as a modifier in the XKB program?
http://www.charvolant.org/~doug/xkb/html/node3.html
It appears the space is unable to be a modifier by default.
Best Answer
I found that Space2Ctrl is a best tool to do this remapping. Very easy, do not require any configuration and works as intended without excess delays. I tried keydouble but it introduced noticeable delay before space was shown on screen