How to define the distance the element moves

Fonts and More General Font Discussions
1

in design, when Use the left arrow key(<–） or Use the right arrow key(–>）,Can the distance they move be defined?
it only be the initial distance size of the software?
or only user Shift+ try it?

2

Hold down Shift to move by 100 funits; hold down Ctrl to move by 1 funit. The default is 10 funits and cannot be changed.

3

tks,if can Free definition，that’s great！