Created attachment 125270 [details]
The pen drawing doesn't show until pressing page up and page down keys.

What I want to do is to draw on the presenter Console (screen #1) and have my drawing input show up on the main presentation screen (screen #2). 

Using the current version (5.0.5.2),

1. I can change the cursor to pen using the slide show menu -> slide show settings.

2. Now, cursor changes to the pen without any problem.

3. I can draw on the presenter console (Screen #1), but the drawn lines appear only after pressing pgup and pgdown keys once.

3. The screen #2 behaves the same way. I can draw, but the drawings appear only after page up/down.

So, it seems that this functionality is already there, but somebody missed calling the redraw() function (or something similar) on mouse-move events.