i cant find the 'window' or place where i can adjust the line/pen tickness. i have checked all, but i cant find.
To adjust the size of your line, look up below the panel of choices (File, Edit, Layer, Window, and so on) You should see Weight and a box to the right of it. It usually says 2px. You can change the 2 to whatever and that will increase the size of your line. I'm almost postive that you can't increase the size of the pen. I hope that this answered your question.