A tablet is just acting as a mouse, with 2 possible modes:
- Absolute: the cursor’s position on the pad mirrors the screen position
- Relative: movements are done like for a mouse, sometimes you have to lift the pen to reposition of the cursor
Each tablet has a utility permitting to set it up and calibrate if necessary, and of course to switch between the 2 modes.
But it is not so much convenient for a vector-based program (Synfig, Inkscape…) unless you would have an integrated screen like a Wacom Cintiq
which would require you to sell of one of your kidneys to buy it…
I would use the tablet only for raster programs such as Krita, MyPaint, Gimp… where a tablet can be used like a real pencil/brush