When you are drawing with the pencil, moving the pencil off of the slide, letting go of left click, and then moving the cursor back on and clicking causes the line to disappear and a dot to be placed where you clicked. Also, after you have dragged your mouse off of the slide and then back on, it will keep drawing the line even if you aren't still holding down left click
When you are drawing with the pencil, moving the pencil off of the slide, letting go of left click, and then moving the cursor back on and clicking causes the line to disappear and a dot to be placed where you clicked. Also, after you have dragged your mouse off of the slide and then back on, it will keep drawing the line even if you aren't still holding down left click