The OCAD Sketch Layer is designed for sketching objects on a tablet.

Of course, objects can also be drawn directly with a drawing mode such as Curve, Straigth line or Freehand mode.

However, the Freehand mode was not very intuitive until now. Fortunately this has improved since the last OCAD update.

The Freehand mode for tablets now feels as intuitive and natural as drawing with the Sketch Layer, as you can see in this video.

For that, you need to select the option  Freehand mode: Adapted for tablet with pen in the OCAD preferences.