Dear Huion,I recently purchased the Huion GT 190 tablet monitor, and I came across a slight issue while I was drawing.When I draw lines with the pen, the lines become a bit jittery and wobbly. I was wondering if this was a driver issue or part of the software itself ? I hope there is a way to remove the jittery in the lines. I look forward to your reply.

Thank you for your contact. 

Would you mind trying the latest updated driver from the following link to see if it helps?

Windows:https://drive.google.com/file/d/0B5LrxEbDolynTkQ5S2hMTjFUc1U/view

Mac:https://www.dropbox.com/s/cd08cbk7q659yvx/PenDisplay20150128.pkg?dl=0

I hope the driver will help.

If the problem still persists, please feel free to contact service@huiontablet.com to ask for more help. 

Thank you.