To manually change a number or angle continuously, select
the Move tool. Then, click on the number or angle and
press the + or – key on you keyboard. Keeping one of these
keys pressed allows you to produce manual animations.
Example: If a point’s coordinates depend on a number k like in P = (2 k, k), the point will move along a straight line when k is changed continuously.
With the arrow keys you can move any free object in Move mode.
Note: You can adjust the increment of the slider on tab ‘Slider’ of the Properties Dialog of this object.
Keyboard shortcuts:
Ctrl + arrow key gives you a step width of 10 units
Alt + arrow key gives you a step width of 100 units
Note: A point on a line can also be moved along its line using the + or – key.